31375381437 has 24 divisors (see below), whose sum is σ = 48182719104. Its totient is φ = 19629982944.

The previous prime is 31375381421. The next prime is 31375381507. The reversal of 31375381437 is 73418357313.

31375381437 is a `hidden beast` number, since 3 + 137 + 5 + 3 + 81 + 437 = 666.

It is not a de Polignac number, because 31375381437 - 2⁴ = 31375381421 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31375381392 and 31375381401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31375381417) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1418953 + ... + 1440894.

It is an arithmetic number, because the mean of its divisors is an integer number (2007613296).

Almost surely, 2^31375381437 is an apocalyptic number.

It is an amenable number.

31375381437 is a deficient number, since it is larger than the sum of its proper divisors (16807337667).

31375381437 is a wasteful number, since it uses less digits than its factorization.

31375381437 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2859929 (or 2859926 counting only the distinct ones).

The product of its digits is 635040, while the sum is 45.

The spelling of 31375381437 in words is "thirty-one billion, three hundred seventy-five million, three hundred eighty-one thousand, four hundred thirty-seven".