22542216 has 32 divisors (see below), whose sum is σ = 57153600. Its totient is φ = 7407680.

The previous prime is 22542209. The next prime is 22542229. The reversal of 22542216 is 61224522.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4911 + ... + 8318.

It is an arithmetic number, because the mean of its divisors is an integer number (1786050).

Almost surely, 2^22542216 is an apocalyptic number.

It is an amenable number.

22542216 is an abundant number, since it is smaller than the sum of its proper divisors (34611384).

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

22542216 is a wasteful number, since it uses less digits than its factorization.

22542216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13309 (or 13305 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 22542216 is about 4747.8643620053. The cubic root of 22542216 is about 282.4872618059.

Adding to 22542216 its reverse (61224522), we get a palindrome (83766738).

The spelling of 22542216 in words is "twenty-two million, five hundred forty-two thousand, two hundred sixteen".