23013216 has 36 divisors (see below), whose sum is σ = 65444652. Its totient is φ = 7670976.

The previous prime is 23013209. The next prime is 23013233. The reversal of 23013216 is 61231032.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×23013216² = 1059216221325312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39666 + ... + 40241.

It is an arithmetic number, because the mean of its divisors is an integer number (1817907).

Almost surely, 2^23013216 is an apocalyptic number.

It is an amenable number.

23013216 is an abundant number, since it is smaller than the sum of its proper divisors (42431436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23013216 is a wasteful number, since it uses less digits than its factorization.

23013216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79923 (or 79912 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 23013216 is about 4797.2091886846. The cubic root of 23013216 is about 284.4411579120.

Adding to 23013216 its reverse (61231032), we get a palindrome (84244248).

The spelling of 23013216 in words is "twenty-three million, thirteen thousand, two hundred sixteen".