31881118043 has 8 divisors (see below), whose sum is σ = 32757038160. Its totient is φ = 31005948960.

The previous prime is 31881117971. The next prime is 31881118063. The reversal of 31881118043 is 34081118813.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31881118043 - 2¹⁰ = 31881117019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31881117988 and 31881118006.

It is not an unprimeable number, because it can be changed into a prime (31881118063) by changing a digit.

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, 101153 + ... + 272018.

It is an arithmetic number, because the mean of its divisors is an integer number (4094629770).

Almost surely, 2^31881118043 is an apocalyptic number.

31881118043 is a deficient number, since it is larger than the sum of its proper divisors (875920117).

31881118043 is a wasteful number, since it uses less digits than its factorization.

31881118043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375517.

The product of its (nonzero) digits is 18432, while the sum is 38.

The spelling of 31881118043 in words is "thirty-one billion, eight hundred eighty-one million, one hundred eighteen thousand, forty-three".