231312212032 has 28 divisors (see below), whose sum is σ = 500738369616. Its totient is φ = 105141914240.

The previous prime is 231312212003. The next prime is 231312212039. The reversal of 231312212032 is 230212213132.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 231312211994 and 231312212012.

It is not an unprimeable number, because it can be changed into a prime (231312212039) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164283538 + ... + 164284945.

Almost surely, 2^231312212032 is an apocalyptic number.

231312212032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

231312212032 is an abundant number, since it is smaller than the sum of its proper divisors (269426157584).

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

231312212032 is a wasteful number, since it uses less digits than its factorization.

231312212032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328568506 (or 328568496 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 231312212032 its reverse (230212213132), we get a palindrome (461524425164).

It can be divided in two parts, 231312 and 212032, that added together give a palindrome (443344).

The spelling of 231312212032 in words is "two hundred thirty-one billion, three hundred twelve million, two hundred twelve thousand, thirty-two".