681180831 has 12 divisors (see below), whose sum is σ = 988047840. Its totient is φ = 452219040.

The previous prime is 681180821. The next prime is 681180833. The reversal of 681180831 is 138081186.

It is not a de Polignac number, because 681180831 - 2¹⁸ = 680918687 is a prime.

It is a super-2 number, since 2×681180831² = 928014649043701122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (681180833) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 156190 + ... + 160491.

It is an arithmetic number, because the mean of its divisors is an integer number (82337320).

Almost surely, 2^681180831 is an apocalyptic number.

681180831 is a deficient number, since it is larger than the sum of its proper divisors (306867009).

681180831 is a wasteful number, since it uses less digits than its factorization.

681180831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316926 (or 316923 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 36.

The square root of 681180831 is about 26099.4412009146. The cubic root of 681180831 is about 879.8746511370.

The spelling of 681180831 in words is "six hundred eighty-one million, one hundred eighty thousand, eight hundred thirty-one".