22615216 has 20 divisors (see below), whose sum is σ = 47187952. Its totient is φ = 10437696.

The previous prime is 22615207. The next prime is 22615237. The reversal of 22615216 is 61251622.

It is a super-2 number, since 2×22615216² = 1022895989453312, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54156 + ... + 54571.

Almost surely, 2^22615216 is an apocalyptic number.

22615216 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

22615216 is an abundant number, since it is smaller than the sum of its proper divisors (24572736).

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

22615216 is a wasteful number, since it uses less digits than its factorization.

22615216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108748 (or 108742 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 22615216 is about 4755.5458151510. The cubic root of 22615216 is about 282.7918658429.

Adding to 22615216 its reverse (61251622), we get a palindrome (83866838).

The spelling of 22615216 in words is "twenty-two million, six hundred fifteen thousand, two hundred sixteen".