31245375387 has 16 divisors (see below), whose sum is σ = 42556580352. Its totient is φ = 20382412320.

The previous prime is 31245375383. The next prime is 31245375389. The reversal of 31245375387 is 78357354213.

It is not a de Polignac number, because 31245375387 - 2² = 31245375383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31245375383) 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, 662608 + ... + 708194.

It is an arithmetic number, because the mean of its divisors is an integer number (2659786272).

Almost surely, 2^31245375387 is an apocalyptic number.

31245375387 is a deficient number, since it is larger than the sum of its proper divisors (11311204965).

31245375387 is a wasteful number, since it uses less digits than its factorization.

31245375387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50498.

The product of its digits is 2116800, while the sum is 48.

The spelling of 31245375387 in words is "thirty-one billion, two hundred forty-five million, three hundred seventy-five thousand, three hundred eighty-seven".