31311312212232 has 48 divisors (see below), whose sum is σ = 91324660621740. Its totient is φ = 9634249911168.

The previous prime is 31311312212177. The next prime is 31311312212251. The reversal of 31311312212232 is 23221221311313.

31311312212232 is a `hidden beast` number, since 3 + 1 + 311 + 3 + 122 + 1 + 223 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 31269054831876 + 42257380356 = 5591874^2 + 205566^2 .

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 31311312212196 and 31311312212205.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16726127383 + ... + 16726129254.

Almost surely, 2^{31311312212232} is an apocalyptic number.

It is an amenable number.

31311312212232 is an abundant number, since it is smaller than the sum of its proper divisors (60013348409508).

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

31311312212232 is a wasteful number, since it uses less digits than its factorization.

31311312212232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33452256662 (or 33452256655 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

Adding to 31311312212232 its reverse (23221221311313), we get a palindrome (54532533523545).

The spelling of 31311312212232 in words is "thirty-one trillion, three hundred eleven billion, three hundred twelve million, two hundred twelve thousand, two hundred thirty-two".