31331013032 has 48 divisors (see below), whose sum is σ = 66316920180. Its totient is φ = 13856451840.

The previous prime is 31331013029. The next prime is 31331013037. The reversal of 31331013032 is 23031013313.

It can be written as a sum of positive squares in 2 ways, for example, as 26196717316 + 5134295716 = 161854^2 + 71654^2 .

It is a super-2 number, since 2×31331013032² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31331012995 and 31331013013.

It is not an unprimeable number, because it can be changed into a prime (31331013037) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 401573 + ... + 473204.

Almost surely, 2^31331013032 is an apocalyptic number.

It is an amenable number.

31331013032 is an abundant number, since it is smaller than the sum of its proper divisors (34985907148).

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

31331013032 is a wasteful number, since it uses less digits than its factorization.

31331013032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 874842 (or 874827 counting only the distinct ones).

The product of its (nonzero) digits is 486, while the sum is 20.

Adding to 31331013032 its reverse (23031013313), we get a palindrome (54362026345).

The spelling of 31331013032 in words is "thirty-one billion, three hundred thirty-one million, thirteen thousand, thirty-two".