168307131 has 8 divisors (see below), whose sum is σ = 226177024. Its totient is φ = 111321000.

The previous prime is 168307129. The next prime is 168307163. The reversal of 168307131 is 131703861.

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

It is not a de Polignac number, because 168307131 - 2¹ = 168307129 is a prime.

It is a super-2 number, since 2×168307131² = 56654580690902322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168307631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 220495 + ... + 221256.

It is an arithmetic number, because the mean of its divisors is an integer number (28272128).

Almost surely, 2^168307131 is an apocalyptic number.

168307131 is a deficient number, since it is larger than the sum of its proper divisors (57869893).

168307131 is a wasteful number, since it uses less digits than its factorization.

168307131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 441881.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 168307131 is about 12973.3238223672. The cubic root of 168307131 is about 552.1208810303.

The spelling of 168307131 in words is "one hundred sixty-eight million, three hundred seven thousand, one hundred thirty-one".