31213322428 has 12 divisors (see below), whose sum is σ = 55438588072. Its totient is φ = 15373725840.

The previous prime is 31213322423. The next prime is 31213322429. The reversal of 31213322428 is 82422331213.

It is a self number, because there is not a number n which added to its sum of digits gives 31213322428.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213322423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58233543 + ... + 58234078.

Almost surely, 2^31213322428 is an apocalyptic number.

It is an amenable number.

31213322428 is a deficient number, since it is larger than the sum of its proper divisors (24225265644).

31213322428 is a wasteful number, since it uses less digits than its factorization.

31213322428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116467692 (or 116467690 counting only the distinct ones).

The product of its digits is 13824, while the sum is 31.

The spelling of 31213322428 in words is "thirty-one billion, two hundred thirteen million, three hundred twenty-two thousand, four hundred twenty-eight".