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127213230 = 23523331557
BaseRepresentation
bin1111001010100…
…01111010101110
322212101002202010
413211101322232
5230031310410
620342342050
73103203024
oct745217256
9285332663
10127213230
1165899201
123672a926
1320481201
1412c76714
15b27cc20
hex7951eae

127213230 has 64 divisors (see below), whose sum is σ = 320122368. Its totient is φ = 32292480.

The previous prime is 127213213. The next prime is 127213259. The reversal of 127213230 is 32312721.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 127213197 and 127213206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 228112 + ... + 228668.

It is an arithmetic number, because the mean of its divisors is an integer number (5001912).

Almost surely, 2127213230 is an apocalyptic number.

127213230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 127213230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160061184).

127213230 is an abundant number, since it is smaller than the sum of its proper divisors (192909138).

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

127213230 is a wasteful number, since it uses less digits than its factorization.

127213230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 921.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 127213230 is about 11278.8842533293. The cubic root of 127213230 is about 502.9337261684.

Adding to 127213230 its reverse (32312721), we get a palindrome (159525951).

It can be divided in two parts, 12721 and 3230, that added together give a palindrome (15951).

The spelling of 127213230 in words is "one hundred twenty-seven million, two hundred thirteen thousand, two hundred thirty".

Divisors: 1 2 3 5 6 10 15 23 30 46 69 115 138 230 331 345 557 662 690 993 1114 1655 1671 1986 2785 3310 3342 4965 5570 7613 8355 9930 12811 15226 16710 22839 25622 38065 38433 45678 64055 76130 76866 114195 128110 184367 192165 228390 368734 384330 553101 921835 1106202 1843670 2765505 4240441 5531010 8480882 12721323 21202205 25442646 42404410 63606615 127213230