31321323320 has 48 divisors (see below), whose sum is σ = 81978774840. Its totient is φ = 10738738752.

The previous prime is 31321323307. The next prime is 31321323347. The reversal of 31321323320 is 2332312313.

It is a congruent number.

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, 7988174 + ... + 7992093.

Almost surely, 2^31321323320 is an apocalyptic number.

It is an amenable number.

31321323320 is an abundant number, since it is smaller than the sum of its proper divisors (50657451520).

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

31321323320 is a wasteful number, since it uses less digits than its factorization.

31321323320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15980292 (or 15980281 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 23.

Adding to 31321323320 its reverse (2332312313), we get a palindrome (33653635633).

The spelling of 31321323320 in words is "thirty-one billion, three hundred twenty-one million, three hundred twenty-three thousand, three hundred twenty".