31313100132 has 36 divisors (see below), whose sum is σ = 79878738940. Its totient is φ = 10341940032.

The previous prime is 31313100127. The next prime is 31313100163. The reversal of 31313100132 is 23100131313.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21011662116 + 10301438016 = 144954^2 + 101496^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3986023 + ... + 3993870.

Almost surely, 2^31313100132 is an apocalyptic number.

It is an amenable number.

31313100132 is an abundant number, since it is smaller than the sum of its proper divisors (48565638808).

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

31313100132 is a wasteful number, since it uses less digits than its factorization.

31313100132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7980012 (or 7980007 counting only the distinct ones).

The product of its (nonzero) digits is 162, while the sum is 18.

Adding to 31313100132 its reverse (23100131313), we get a palindrome (54413231445).

The spelling of 31313100132 in words is "thirty-one billion, three hundred thirteen million, one hundred thousand, one hundred thirty-two".