22237865 has 12 divisors (see below), whose sum is σ = 28897164. Its totient is φ = 16421184.

The previous prime is 22237829. The next prime is 22237871. The reversal of 22237865 is 56873222.

It can be written as a sum of positive squares in 6 ways, for example, as 3193369 + 19044496 = 1787^2 + 4364^2 .

It is not a de Polignac number, because 22237865 - 2¹⁶ = 22172329 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12314 + ... + 14003.

It is an arithmetic number, because the mean of its divisors is an integer number (2408097).

Almost surely, 2^22237865 is an apocalyptic number.

It is an amenable number.

22237865 is a deficient number, since it is larger than the sum of its proper divisors (6659299).

22237865 is a wasteful number, since it uses less digits than its factorization.

22237865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26348 (or 26335 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 22237865 is about 4715.7040831672. The cubic root of 22237865 is about 281.2101744432.

The spelling of 22237865 in words is "twenty-two million, two hundred thirty-seven thousand, eight hundred sixty-five".