23215616 has 20 divisors (see below), whose sum is σ = 46386912. Its totient is φ = 11607552.

The previous prime is 23215597. The next prime is 23215667. The reversal of 23215616 is 61651232.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22160 + ... + 23183.

Almost surely, 2^23215616 is an apocalyptic number.

It is an amenable number.

23215616 is a deficient number, since it is larger than the sum of its proper divisors (23171296).

23215616 is an frugal number, since it uses more digits than its factorization.

23215616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45361 (or 45345 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 23215616 is about 4818.2586065922. The cubic root of 23215616 is about 285.2726067135.

Adding to 23215616 its reverse (61651232), we get a palindrome (84866848).

The spelling of 23215616 in words is "twenty-three million, two hundred fifteen thousand, six hundred sixteen".