231312320100 has 108 divisors (see below), whose sum is σ = 750036929460. Its totient is φ = 59556268800.

The previous prime is 231312320089. The next prime is 231312320117. The reversal of 231312320100 is 1023213132.

231312320100 is a `hidden beast` number, since 2 + 31 + 312 + 320 + 1 + 0 + 0 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 1326853476 + 229985466624 = 36426^2 + 479568^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 4405171 + ... + 4457370.

Almost surely, 2^231312320100 is an apocalyptic number.

231312320100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231312320100 is an abundant number, since it is smaller than the sum of its proper divisors (518724609360).

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

231312320100 is a wasteful number, since it uses less digits than its factorization.

231312320100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8862590 (or 8862580 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 231312320100 its reverse (1023213132), we get a palindrome (232335533232).

The spelling of 231312320100 in words is "two hundred thirty-one billion, three hundred twelve million, three hundred twenty thousand, one hundred".