22625809 has 4 divisors (see below), whose sum is σ = 23177700. Its totient is φ = 22073920.

The previous prime is 22625791. The next prime is 22625821. The reversal of 22625809 is 90852622.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4161600 + 18464209 = 2040^2 + 4297^2 .

It is a cyclic number.

It is not a de Polignac number, because 22625809 - 2²¹ = 20528657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22625849) 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, 275884 + ... + 275965.

It is an arithmetic number, because the mean of its divisors is an integer number (5794425).

Almost surely, 2^22625809 is an apocalyptic number.

It is an amenable number.

22625809 is a deficient number, since it is larger than the sum of its proper divisors (551891).

22625809 is an equidigital number, since it uses as much as digits as its factorization.

22625809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 551890.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 22625809 is about 4756.6594370419. The cubic root of 22625809 is about 282.8360123244.

The spelling of 22625809 in words is "twenty-two million, six hundred twenty-five thousand, eight hundred nine".