31545334520 has 32 divisors (see below), whose sum is σ = 81116575200. Its totient is φ = 10815543168.

The previous prime is 31545334519. The next prime is 31545334543. The reversal of 31545334520 is 2543354513.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56330675 + ... + 56331234.

It is an arithmetic number, because the mean of its divisors is an integer number (2534892975).

Almost surely, 2^31545334520 is an apocalyptic number.

It is an amenable number.

31545334520 is an abundant number, since it is smaller than the sum of its proper divisors (49571240680).

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

31545334520 is a wasteful number, since it uses less digits than its factorization.

31545334520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112661927 (or 112661923 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 35.

The spelling of 31545334520 in words is "thirty-one billion, five hundred forty-five million, three hundred thirty-four thousand, five hundred twenty".