31113201132 has 72 divisors (see below), whose sum is σ = 84778228080. Its totient is φ = 9564117120.

The previous prime is 31113201113. The next prime is 31113201137. The reversal of 31113201132 is 23110231113.

31113201132 is a `hidden beast` number, since 311 + 1 + 320 + 1 + 1 + 32 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (31113201137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 465219 + ... + 527877.

It is an arithmetic number, because the mean of its divisors is an integer number (1177475390).

Almost surely, 2^31113201132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31113201132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42389114040).

31113201132 is an abundant number, since it is smaller than the sum of its proper divisors (53665026948).

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

31113201132 is a wasteful number, since it uses less digits than its factorization.

31113201132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63743 (or 63738 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 31113201132 its reverse (23110231113), we get a palindrome (54223432245).

The spelling of 31113201132 in words is "thirty-one billion, one hundred thirteen million, two hundred one thousand, one hundred thirty-two".