22565320 has 16 divisors (see below), whose sum is σ = 50772060. Its totient is φ = 9026112.

The previous prime is 22565299. The next prime is 22565321. The reversal of 22565320 is 2356522.

It can be written as a sum of positive squares in 2 ways, for example, as 22524516 + 40804 = 4746^2 + 202^2 .

It is a super-3 number, since 3×22565320³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (22565321) 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, 282027 + ... + 282106.

Almost surely, 2^22565320 is an apocalyptic number.

22565320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22565320 is an abundant number, since it is smaller than the sum of its proper divisors (28206740).

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

22565320 is a wasteful number, since it uses less digits than its factorization.

22565320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 564144 (or 564140 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 22565320 is about 4750.2968328306. The cubic root of 22565320 is about 282.5837379349.

The spelling of 22565320 in words is "twenty-two million, five hundred sixty-five thousand, three hundred twenty".