22243865 has 16 divisors (see below), whose sum is σ = 30585600. Its totient is φ = 15213120.

The previous prime is 22243849. The next prime is 22243867. The reversal of 22243865 is 56834222.

It is not a de Polignac number, because 22243865 - 2⁴ = 22243849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22243867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20435 + ... + 21495.

It is an arithmetic number, because the mean of its divisors is an integer number (1911600).

Almost surely, 2^22243865 is an apocalyptic number.

It is an amenable number.

22243865 is a deficient number, since it is larger than the sum of its proper divisors (8341735).

22243865 is a wasteful number, since it uses less digits than its factorization.

22243865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1672.

The product of its digits is 23040, while the sum is 32.

The square root of 22243865 is about 4716.3402124953. The cubic root of 22243865 is about 281.2354632816.

The spelling of 22243865 in words is "twenty-two million, two hundred forty-three thousand, eight hundred sixty-five".