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31093254180 = 22325473336497
BaseRepresentation
bin11100111101010011…
…010110100000100100
32222020221102222011200
4130331103112200210
51002134333113210
622141204202500
72150343204552
oct347523264044
988227388150
1031093254180
111220637108a
126039099430
132c16a23471
14170d70cbd2
15c1eacb0c0
hex73d4d6824

31093254180 has 72 divisors (see below), whose sum is σ = 94338716472. Its totient is φ = 8289555456.

The previous prime is 31093254161. The next prime is 31093254209. The reversal of 31093254180 is 8145239013.

31093254180 is a `hidden beast` number, since 3 + 1 + 0 + 9 + 32 + 541 + 80 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7632817956 + 23460436224 = 87366^2 + 153168^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 833692 + ... + 870188.

It is an arithmetic number, because the mean of its divisors is an integer number (1310259951).

Almost surely, 231093254180 is an apocalyptic number.

31093254180 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31093254180 is an abundant number, since it is smaller than the sum of its proper divisors (63245462292).

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

31093254180 is a wasteful number, since it uses less digits than its factorization.

31093254180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41245 (or 41240 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The spelling of 31093254180 in words is "thirty-one billion, ninety-three million, two hundred fifty-four thousand, one hundred eighty".

Divisors: 1 2 3 4 5 6 9 10 12 15 18 20 30 36 45 60 90 180 4733 9466 14199 18932 23665 28398 36497 42597 47330 56796 70995 72994 85194 94660 109491 141990 145988 170388 182485 212985 218982 283980 328473 364970 425970 437964 547455 656946 729940 851940 1094910 1313892 1642365 2189820 3284730 6569460 172740301 345480602 518220903 690961204 863701505 1036441806 1554662709 1727403010 2072883612 2591104515 3109325418 3454806020 5182209030 6218650836 7773313545 10364418060 15546627090 31093254180