22503216 has 20 divisors (see below), whose sum is σ = 58133432. Its totient is φ = 7501056.

The previous prime is 22503211. The next prime is 22503227. The reversal of 22503216 is 61230522.

It is a plaindrome in base 11.

It is a zygodrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 22503192 and 22503201.

It is not an unprimeable number, because it can be changed into a prime (22503211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234361 + ... + 234456.

Almost surely, 2^22503216 is an apocalyptic number.

It is an amenable number.

22503216 is an abundant number, since it is smaller than the sum of its proper divisors (35630216).

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

22503216 is a wasteful number, since it uses less digits than its factorization.

22503216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468828 (or 468822 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 22503216 is about 4743.7554743051. The cubic root of 22503216 is about 282.3242585652.

Adding to 22503216 its reverse (61230522), we get a palindrome (83733738).

The spelling of 22503216 in words is "twenty-two million, five hundred three thousand, two hundred sixteen".