31860272421 has 48 divisors (see below), whose sum is σ = 47120486400. Its totient is φ = 20740161024.

The previous prime is 31860272363. The next prime is 31860272453. The reversal of 31860272421 is 12427206813.

It is a happy number.

31860272421 is a `hidden beast` number, since 3 + 1 + 8 + 602 + 7 + 2 + 42 + 1 = 666.

It is not a de Polignac number, because 31860272421 - 2⁶ = 31860272357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31860272461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 24909660 + ... + 24910938.

It is an arithmetic number, because the mean of its divisors is an integer number (981676800).

Almost surely, 2^31860272421 is an apocalyptic number.

It is an amenable number.

31860272421 is a deficient number, since it is larger than the sum of its proper divisors (15260213979).

31860272421 is a wasteful number, since it uses less digits than its factorization.

31860272421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1738 (or 1735 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The spelling of 31860272421 in words is "thirty-one billion, eight hundred sixty million, two hundred seventy-two thousand, four hundred twenty-one".