23164215291 has 12 divisors (see below), whose sum is σ = 38239339632. Its totient is φ = 13236694416.

The previous prime is 23164215287. The next prime is 23164215293. The reversal of 23164215291 is 19251246132.

23164215291 is a `hidden beast` number, since 2 + 3 + 1 + 642 + 1 + 5 + 2 + 9 + 1 = 666.

It is not a de Polignac number, because 23164215291 - 2² = 23164215287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (23164215293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183842916 + ... + 183843041.

It is an arithmetic number, because the mean of its divisors is an integer number (3186611636).

Almost surely, 2^23164215291 is an apocalyptic number.

23164215291 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23164215291 is a deficient number, since it is larger than the sum of its proper divisors (15075124341).

23164215291 is a wasteful number, since it uses less digits than its factorization.

23164215291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367685970 (or 367685967 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The spelling of 23164215291 in words is "twenty-three billion, one hundred sixty-four million, two hundred fifteen thousand, two hundred ninety-one".