23155216 has 40 divisors (see below), whose sum is σ = 51941120. Its totient is φ = 9794304.

The previous prime is 23155213. The next prime is 23155217. The reversal of 23155216 is 61255132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23155213) 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, 7540 + ... + 10156.

It is an arithmetic number, because the mean of its divisors is an integer number (1298528).

Almost surely, 2^23155216 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 23155216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25970560).

23155216 is an abundant number, since it is smaller than the sum of its proper divisors (28785904).

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

23155216 is a wasteful number, since it uses less digits than its factorization.

23155216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2711 (or 2705 counting only the distinct ones).

The product of its digits is 1800, while the sum is 25.

The square root of 23155216 is about 4811.9866998985. The cubic root of 23155216 is about 285.0249942171.

The spelling of 23155216 in words is "twenty-three million, one hundred fifty-five thousand, two hundred sixteen".