31233074472 has 80 divisors (see below), whose sum is σ = 90498186900. Its totient is φ = 10052017920.

The previous prime is 31233074459. The next prime is 31233074479. The reversal of 31233074472 is 27447033213.

31233074472 is a `hidden beast` number, since 312 + 330 + 7 + 4 + 4 + 7 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 28064960676 + 3168113796 = 167526^2 + 56286^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is not an unprimeable number, because it can be changed into a prime (31233074479) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 812229 + ... + 849812.

Almost surely, 2^31233074472 is an apocalyptic number.

It is an amenable number.

31233074472 is an abundant number, since it is smaller than the sum of its proper divisors (59265112428).

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

31233074472 is a wasteful number, since it uses less digits than its factorization.

31233074472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1662088 (or 1662075 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 36.

The spelling of 31233074472 in words is "thirty-one billion, two hundred thirty-three million, seventy-four thousand, four hundred seventy-two".