168981231 has 32 divisors (see below), whose sum is σ = 247334400. Its totient is φ = 102211200.

The previous prime is 168981221. The next prime is 168981259. The reversal of 168981231 is 132189861.

It is not a de Polignac number, because 168981231 - 2⁵ = 168981199 is a prime.

It is a super-2 number, since 2×168981231² = 57109312860550722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 168981231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168981221) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 249265 + ... + 249941.

It is an arithmetic number, because the mean of its divisors is an integer number (7729200).

Almost surely, 2^168981231 is an apocalyptic number.

168981231 is a deficient number, since it is larger than the sum of its proper divisors (78353169).

168981231 is a wasteful number, since it uses less digits than its factorization.

168981231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879.

The product of its digits is 20736, while the sum is 39.

The square root of 168981231 is about 12999.2780953405. The cubic root of 168981231 is about 552.8570132385.

The spelling of 168981231 in words is "one hundred sixty-eight million, nine hundred eighty-one thousand, two hundred thirty-one".