31103103132 has 72 divisors (see below), whose sum is σ = 82926480000. Its totient is φ = 9802241568.

The previous prime is 31103103127. The next prime is 31103103181. The reversal of 31103103132 is 23130130113.

It is a happy number.

31103103132 is a `hidden beast` number, since 31 + 10 + 310 + 313 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 295753 + ... + 386879.

Almost surely, 2^31103103132 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 31103103132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41463240000).

31103103132 is an abundant number, since it is smaller than the sum of its proper divisors (51823376868).

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

31103103132 is a wasteful number, since it uses less digits than its factorization.

31103103132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91655 (or 91650 counting only the distinct ones).

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

Adding to 31103103132 its reverse (23130130113), we get a palindrome (54233233245).

The spelling of 31103103132 in words is "thirty-one billion, one hundred three million, one hundred three thousand, one hundred thirty-two".