31387648054 has 32 divisors (see below), whose sum is σ = 55242547200. Its totient is φ = 13369274856.

The previous prime is 31387648043. The next prime is 31387648091. The reversal of 31387648054 is 45084678313.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a junction number, because it is equal to n+sod(n) for n = 31387647989 and 31387648007.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 28534 + ... + 252169.

It is an arithmetic number, because the mean of its divisors is an integer number (1726329600).

Almost surely, 2^31387648054 is an apocalyptic number.

31387648054 is a deficient number, since it is larger than the sum of its proper divisors (23854899146).

31387648054 is a wasteful number, since it uses less digits than its factorization.

31387648054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280889 (or 280875 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 49.

The spelling of 31387648054 in words is "thirty-one billion, three hundred eighty-seven million, six hundred forty-eight thousand, fifty-four".