22516566 has 16 divisors (see below), whose sum is σ = 45447600. Its totient is φ = 7436448.

The previous prime is 22516553. The next prime is 22516567. The reversal of 22516566 is 66561522.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22516567) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16561 + ... + 17868.

It is an arithmetic number, because the mean of its divisors is an integer number (2840475).

Almost surely, 2^22516566 is an apocalyptic number.

22516566 is an abundant number, since it is smaller than the sum of its proper divisors (22931034).

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

22516566 is a wasteful number, since it uses less digits than its factorization.

22516566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34543.

The product of its digits is 21600, while the sum is 33.

The square root of 22516566 is about 4745.1623786758. The cubic root of 22516566 is about 282.3800770131.

The spelling of 22516566 in words is "twenty-two million, five hundred sixteen thousand, five hundred sixty-six".