31146531894 has 24 divisors (see below), whose sum is σ = 67487647032. Its totient is φ = 10381639680.

The previous prime is 31146531887. The next prime is 31146531901. The reversal of 31146531894 is 49813564113.

31146531894 is a `hidden beast` number, since 3 + 1 + 1 + 465 + 3 + 189 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (31146531887) and next prime (31146531901).

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 11 ways as a sum of consecutive naturals, for example, 476214 + ... + 537654.

It is an arithmetic number, because the mean of its divisors is an integer number (2811985293).

Almost surely, 2^31146531894 is an apocalyptic number.

31146531894 is an abundant number, since it is smaller than the sum of its proper divisors (36341115138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31146531894 is a wasteful number, since it uses less digits than its factorization.

31146531894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89612 (or 89609 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The spelling of 31146531894 in words is "thirty-one billion, one hundred forty-six million, five hundred thirty-one thousand, eight hundred ninety-four".