31055900621 has 16 divisors (see below), whose sum is σ = 32911515648. Its totient is φ = 29269993200.

The previous prime is 31055900599. The next prime is 31055900639. The reversal of 31055900621 is 12600955013.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31055900621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31055900651) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35276 + ... + 251706.

It is an arithmetic number, because the mean of its divisors is an integer number (2056969728).

Almost surely, 2^31055900621 is an apocalyptic number.

It is an amenable number.

31055900621 is a deficient number, since it is larger than the sum of its proper divisors (1855615027).

31055900621 is a wasteful number, since it uses less digits than its factorization.

31055900621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216592.

The product of its (nonzero) digits is 8100, while the sum is 32.

The spelling of 31055900621 in words is "thirty-one billion, fifty-five million, nine hundred thousand, six hundred twenty-one".