31881253084 has 24 divisors (see below), whose sum is σ = 56129340960. Its totient is φ = 15844454976.

The previous prime is 31881253067. The next prime is 31881253109. The reversal of 31881253084 is 48035218813.

It is a super-2 number, since 2×31881253084² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31881253084.

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 7 ways as a sum of consecutive naturals, for example, 823449 + ... + 861295.

It is an arithmetic number, because the mean of its divisors is an integer number (2338722540).

Almost surely, 2^31881253084 is an apocalyptic number.

It is an amenable number.

31881253084 is a deficient number, since it is larger than the sum of its proper divisors (24248087876).

31881253084 is a wasteful number, since it uses less digits than its factorization.

31881253084 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39117 (or 39115 counting only the distinct ones).

The product of its (nonzero) digits is 184320, while the sum is 43.

The spelling of 31881253084 in words is "thirty-one billion, eight hundred eighty-one million, two hundred fifty-three thousand, eighty-four".