31465256412 has 24 divisors (see below), whose sum is σ = 77737692816. Its totient is φ = 9871452928.

The previous prime is 31465256411. The next prime is 31465256441. The reversal of 31465256412 is 21465256413.

It is a super-2 number, since 2×31465256412² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31465256411) 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, 77120523 + ... + 77120930.

It is an arithmetic number, because the mean of its divisors is an integer number (3239070534).

Almost surely, 2^31465256412 is an apocalyptic number.

It is an amenable number.

31465256412 is an abundant number, since it is smaller than the sum of its proper divisors (46272436404).

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

31465256412 is a wasteful number, since it uses less digits than its factorization.

31465256412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154241477 (or 154241475 counting only the distinct ones).

The product of its digits is 172800, while the sum is 39.

Subtracting from 31465256412 its reverse (21465256413), we obtain a palindrome (9999999999).

The spelling of 31465256412 in words is "thirty-one billion, four hundred sixty-five million, two hundred fifty-six thousand, four hundred twelve".