31504523412 has 24 divisors (see below), whose sum is σ = 73879960000. Its totient is φ = 10448735616.

The previous prime is 31504523411. The next prime is 31504523429. The reversal of 31504523412 is 21432540513.

It is a super-2 number, since 2×31504523412² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31504523412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31504523411) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6594037 + ... + 6598812.

Almost surely, 2^31504523412 is an apocalyptic number.

It is an amenable number.

31504523412 is an abundant number, since it is smaller than the sum of its proper divisors (42375436588).

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

31504523412 is a wasteful number, since it uses less digits than its factorization.

31504523412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13193055 (or 13193053 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 30.

The spelling of 31504523412 in words is "thirty-one billion, five hundred four million, five hundred twenty-three thousand, four hundred twelve".