164868531 has 16 divisors (see below), whose sum is σ = 233715456. Its totient is φ = 103147616.

The previous prime is 164868523. The next prime is 164868547. The reversal of 164868531 is 135868461.

It is a cyclic number.

It is not a de Polignac number, because 164868531 - 2³ = 164868523 is a prime.

It is a super-2 number, since 2×164868531² = 54363265028195922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (164868581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18885 + ... + 26198.

It is an arithmetic number, because the mean of its divisors is an integer number (14607216).

Almost surely, 2^164868531 is an apocalyptic number.

164868531 is a deficient number, since it is larger than the sum of its proper divisors (68846925).

164868531 is a wasteful number, since it uses less digits than its factorization.

164868531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45162.

The product of its digits is 138240, while the sum is 42.

The square root of 164868531 is about 12840.1141350067. The cubic root of 164868531 is about 548.3349433983.

The spelling of 164868531 in words is "one hundred sixty-four million, eight hundred sixty-eight thousand, five hundred thirty-one".