13168531 has 4 divisors (see below), whose sum is σ = 13327272. Its totient is φ = 13009792.

The previous prime is 13168499. The next prime is 13168541. The reversal of 13168531 is 13586131.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 13168531 - 2⁵ = 13168499 is a prime.

It is a super-2 number, since 2×13168531² = 346820417395922, which 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 13168531.

It is not an unprimeable number, because it can be changed into a prime (13168541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79246 + ... + 79411.

It is an arithmetic number, because the mean of its divisors is an integer number (3331818).

Almost surely, 2^13168531 is an apocalyptic number.

13168531 is a deficient number, since it is larger than the sum of its proper divisors (158741).

13168531 is an equidigital number, since it uses as much as digits as its factorization.

13168531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158740.

The product of its digits is 2160, while the sum is 28.

The square root of 13168531 is about 3628.8470620846. The cubic root of 13168531 is about 236.1451933802.

The spelling of 13168531 in words is "thirteen million, one hundred sixty-eight thousand, five hundred thirty-one".