22209925 has 6 divisors (see below), whose sum is σ = 27540338. Its totient is φ = 17767920.

The previous prime is 22209923. The next prime is 22209931. The reversal of 22209925 is 52990222.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 6796449 + 15413476 = 2607^2 + 3926^2 .

It is not a de Polignac number, because 22209925 - 2¹ = 22209923 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 (22209923) 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, 444174 + ... + 444223.

Almost surely, 2^22209925 is an apocalyptic number.

22209925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22209925 is a deficient number, since it is larger than the sum of its proper divisors (5330413).

22209925 is an equidigital number, since it uses as much as digits as its factorization.

22209925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 888407 (or 888402 counting only the distinct ones).

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

The square root of 22209925 is about 4712.7407100328. The cubic root of 22209925 is about 281.0923528038.

The spelling of 22209925 in words is "twenty-two million, two hundred nine thousand, nine hundred twenty-five".