22245817 has 16 divisors (see below), whose sum is σ = 25367040. Its totient is φ = 19324800.

The previous prime is 22245803. The next prime is 22245833. The reversal of 22245817 is 71854222.

It is a happy number.

It is not a de Polignac number, because 22245817 - 2¹⁵ = 22213049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22245017) 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, 29983 + ... + 30715.

It is an arithmetic number, because the mean of its divisors is an integer number (1585440).

Almost surely, 2^22245817 is an apocalyptic number.

It is an amenable number.

22245817 is a deficient number, since it is larger than the sum of its proper divisors (3121223).

22245817 is a wasteful number, since it uses less digits than its factorization.

22245817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864.

The product of its digits is 8960, while the sum is 31.

The square root of 22245817 is about 4716.5471480735. The cubic root of 22245817 is about 281.2436896033.

The spelling of 22245817 in words is "twenty-two million, two hundred forty-five thousand, eight hundred seventeen".