22625209 has 2 divisors, whose sum is σ = 22625210. Its totient is φ = 22625208.

The previous prime is 22625179. The next prime is 22625221. The reversal of 22625209 is 90252622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22467600 + 157609 = 4740^2 + 397^2 .

It is a cyclic number.

It is not a de Polignac number, because 22625209 - 2⁹ = 22624697 is a prime.

It is not a weakly prime, because it can be changed into another prime (22625269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11312604 + 11312605.

It is an arithmetic number, because the mean of its divisors is an integer number (11312605).

Almost surely, 2^22625209 is an apocalyptic number.

It is an amenable number.

22625209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22625209 is an equidigital number, since it uses as much as digits as its factorization.

22625209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 22625209 is about 4756.5963671516. The cubic root of 22625209 is about 282.8335121838.

The spelling of 22625209 in words is "twenty-two million, six hundred twenty-five thousand, two hundred nine".