31223055504000 has 128 divisors (see below), whose sum is σ = 103504429154880. Its totient is φ = 8326148121600.

The previous prime is 31223055503929. The next prime is 31223055504061. The reversal of 31223055504000 is 40555032213.

It is a tau number, because it is divible by the number of its divisors (128).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325192162 + ... + 325288161.

Almost surely, 2^{31223055504000} is an apocalyptic number.

31223055504000 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31223055504000 is an abundant number, since it is smaller than the sum of its proper divisors (72281373650880).

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

31223055504000 is an equidigital number, since it uses as much as digits as its factorization.

31223055504000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650480355 (or 650480333 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 30.

The spelling of 31223055504000 in words is "thirty-one trillion, two hundred twenty-three billion, fifty-five million, five hundred four thousand".