31620313262421 has 32 divisors (see below), whose sum is σ = 50467097694720. Its totient is φ = 19451428091712.

The previous prime is 31620313262411. The next prime is 31620313262479. The reversal of 31620313262421 is 12426231302613.

31620313262421 is a `hidden beast` number, since 3 + 1 + 6 + 2 + 0 + 3 + 1 + 3 + 2 + 624 + 21 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-31620313262421 is a prime.

It is a super-3 number, since 3×31620313262421³ (a number of 41 digits) contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31620313262411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15780781 + ... + 17671266.

It is an arithmetic number, because the mean of its divisors is an integer number (1577096802960).

Almost surely, 2^{31620313262421} is an apocalyptic number.

It is an amenable number.

31620313262421 is a deficient number, since it is larger than the sum of its proper divisors (18846784432299).

31620313262421 is a wasteful number, since it uses less digits than its factorization.

31620313262421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33454762 (or 33454756 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 36.

The spelling of 31620313262421 in words is "thirty-one trillion, six hundred twenty billion, three hundred thirteen million, two hundred sixty-two thousand, four hundred twenty-one".