31231213212232 has 64 divisors (see below), whose sum is σ = 63942450068160. Its totient is φ = 14182581600000.

The previous prime is 31231213212209. The next prime is 31231213212293. The reversal of 31231213212232 is 23221231213213.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 31231213212232.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1387980982 + ... + 1388003482.

It is an arithmetic number, because the mean of its divisors is an integer number (999100782315).

Almost surely, 2^{31231213212232} is an apocalyptic number.

It is an amenable number.

31231213212232 is an abundant number, since it is smaller than the sum of its proper divisors (32711236855928).

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

31231213212232 is a wasteful number, since it uses less digits than its factorization.

31231213212232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36734 (or 36730 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

Adding to 31231213212232 its reverse (23221231213213), we get a palindrome (54452444425445).

The spelling of 31231213212232 in words is "thirty-one trillion, two hundred thirty-one billion, two hundred thirteen million, two hundred twelve thousand, two hundred thirty-two".