Search a number
-
+
213956876880 = 243251717480137
BaseRepresentation
bin1100011101000011010…
…0101101101001010000
3202110021000121111021100
43013100310231221100
512001140430030010
6242142422224400
721313023306105
oct3072064555120
9673230544240
10213956876880
118281409639a
1235571885100
1317239a0cac6
14a4d9970aac
1558738da2c0
hex31d0d2da50

213956876880 has 120 divisors (see below), whose sum is σ = 760805526312. Its totient is φ = 53698977792.

The previous prime is 213956876879. The next prime is 213956876891. The reversal of 213956876880 is 88678659312.

213956876880 is a `hidden beast` number, since 2 + 1 + 3 + 9 + 568 + 7 + 68 + 8 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 43612474896 + 170344401984 = 208836^2 + 412728^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8727829 + ... + 8752308.

Almost surely, 2213956876880 is an apocalyptic number.

213956876880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

213956876880 is an abundant number, since it is smaller than the sum of its proper divisors (546848649432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213956876880 is a wasteful number, since it uses less digits than its factorization.

213956876880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17480173 (or 17480164 counting only the distinct ones).

The product of its (nonzero) digits is 34836480, while the sum is 63.

The spelling of 213956876880 in words is "two hundred thirteen billion, nine hundred fifty-six million, eight hundred seventy-six thousand, eight hundred eighty".

Divisors: 1 2 3 4 5 6 8 9 10 12 15 16 17 18 20 24 30 34 36 40 45 48 51 60 68 72 80 85 90 102 120 136 144 153 170 180 204 240 255 272 306 340 360 408 510 612 680 720 765 816 1020 1224 1360 1530 2040 2448 3060 4080 6120 12240 17480137 34960274 52440411 69920548 87400685 104880822 139841096 157321233 174801370 209761644 262202055 279682192 297162329 314642466 349602740 419523288 524404110 594324658 629284932 699205480 786606165 839046576 891486987 1048808220 1188649316 1258569864 1398410960 1485811645 1573212330 1782973974 2097616440 2377298632 2517139728 2674460961 2971623290 3146424660 3565947948 4195232880 4457434935 4754597264 5348921922 5943246580 6292849320 7131895896 8914869870 10697843844 11886493160 12585698640 13372304805 14263791792 17829739740 21395687688 23772986320 26744609610 35659479480 42791375376 53489219220 71318958960 106978438440 213956876880