31871081874 has 32 divisors (see below), whose sum is σ = 67556885760. Its totient is φ = 9989114112.

The previous prime is 31871081861. The next prime is 31871081881. The reversal of 31871081874 is 47818017813.

It is a super-2 number, since 2×31871081874² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44389 + ... + 256344.

It is an arithmetic number, because the mean of its divisors is an integer number (2111152680).

Almost surely, 2^31871081874 is an apocalyptic number.

31871081874 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

31871081874 is an abundant number, since it is smaller than the sum of its proper divisors (35685803886).

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

31871081874 is a wasteful number, since it uses less digits than its factorization.

31871081874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301794.

The product of its (nonzero) digits is 301056, while the sum is 48.

The spelling of 31871081874 in words is "thirty-one billion, eight hundred seventy-one million, eighty-one thousand, eight hundred seventy-four".