22252909 has 6 divisors (see below), whose sum is σ = 25886094. Its totient is φ = 19073880.

The previous prime is 22252883. The next prime is 22252913. The reversal of 22252909 is 90925222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 14607684 + 7645225 = 3822^2 + 2765^2 .

It is not a de Polignac number, because 22252909 - 2⁵ = 22252877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22252939) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 227022 + ... + 227119.

It is an arithmetic number, because the mean of its divisors is an integer number (4314349).

Almost surely, 2^22252909 is an apocalyptic number.

It is an amenable number.

22252909 is a deficient number, since it is larger than the sum of its proper divisors (3633185).

22252909 is an equidigital number, since it uses as much as digits as its factorization.

22252909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454155 (or 454148 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 22252909 is about 4717.2989093336. The cubic root of 22252909 is about 281.2735733986.

The spelling of 22252909 in words is "twenty-two million, two hundred fifty-two thousand, nine hundred nine".