23315216 has 10 divisors (see below), whose sum is σ = 45173262. Its totient is φ = 11657600.

The previous prime is 23315197. The next prime is 23315231. The reversal of 23315216 is 61251332.

It can be written as a sum of positive squares in only one way, i.e., 23001616 + 313600 = 4796^2 + 560^2 .

It is a junction number, because it is equal to n+sod(n) for n = 23315191 and 23315200.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 728585 + ... + 728616.

Almost surely, 2^23315216 is an apocalyptic number.

It is an amenable number.

23315216 is a deficient number, since it is larger than the sum of its proper divisors (21858046).

23315216 is a wasteful number, since it uses less digits than its factorization.

23315216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1457209 (or 1457203 counting only the distinct ones).

The product of its digits is 1080, while the sum is 23.

The square root of 23315216 is about 4828.5832290642. The cubic root of 23315216 is about 285.6799850251.

Adding to 23315216 its reverse (61251332), we get a palindrome (84566548).

The spelling of 23315216 in words is "twenty-three million, three hundred fifteen thousand, two hundred sixteen".