31129874923181 has 32 divisors (see below), whose sum is σ = 34330040303616. Its totient is φ = 28132426080000.

The previous prime is 31129874923177. The next prime is 31129874923223. The reversal of 31129874923181 is 18132947892113.

It is not a de Polignac number, because 31129874923181 - 2² = 31129874923177 is a prime.

It is a super-2 number, since 2×31129874923181² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31129874923181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31129874920181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12279626 + ... + 14596196.

It is an arithmetic number, because the mean of its divisors is an integer number (1072813759488).

Almost surely, 2^{31129874923181} is an apocalyptic number.

31129874923181 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

31129874923181 is a deficient number, since it is larger than the sum of its proper divisors (3200165380435).

31129874923181 is a wasteful number, since it uses less digits than its factorization.

31129874923181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2317073.

The product of its digits is 5225472, while the sum is 59.

The spelling of 31129874923181 in words is "thirty-one trillion, one hundred twenty-nine billion, eight hundred seventy-four million, nine hundred twenty-three thousand, one hundred eighty-one".