31511314132 has 6 divisors (see below), whose sum is σ = 55144799738. Its totient is φ = 15755657064.

The previous prime is 31511314129. The next prime is 31511314169. The reversal of 31511314132 is 23141311513.

It can be written as a sum of positive squares in only one way, i.e., 29579184196 + 1932129936 = 171986^2 + 43956^2 .

It is a junction number, because it is equal to n+sod(n) for n = 31511314097 and 31511314106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3938914263 + ... + 3938914270.

Almost surely, 2^31511314132 is an apocalyptic number.

It is an amenable number.

31511314132 is a deficient number, since it is larger than the sum of its proper divisors (23633485606).

31511314132 is a wasteful number, since it uses less digits than its factorization.

31511314132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7877828537 (or 7877828535 counting only the distinct ones).

The product of its digits is 1080, while the sum is 25.

Adding to 31511314132 its reverse (23141311513), we get a palindrome (54652625645).

The spelling of 31511314132 in words is "thirty-one billion, five hundred eleven million, three hundred fourteen thousand, one hundred thirty-two".