22265815 has 48 divisors (see below), whose sum is σ = 33516000. Its totient is φ = 14065920.

The previous prime is 22265807. The next prime is 22265849. The reversal of 22265815 is 51856222.

It is not a de Polignac number, because 22265815 - 2³ = 22265807 is a prime.

It is a super-2 number, since 2×22265815² = 991533035228450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 149361 + ... + 149509.

It is an arithmetic number, because the mean of its divisors is an integer number (698250).

Almost surely, 2^22265815 is an apocalyptic number.

22265815 is a deficient number, since it is larger than the sum of its proper divisors (11250185).

22265815 is a wasteful number, since it uses less digits than its factorization.

22265815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208 (or 197 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 22265815 is about 4718.6666548931. Note that the first 4 decimals coincide. The cubic root of 22265815 is about 281.3279395518.

The spelling of 22265815 in words is "twenty-two million, two hundred sixty-five thousand, eight hundred fifteen".