22257890209 has 2 divisors, whose sum is σ = 22257890210. Its totient is φ = 22257890208.

The previous prime is 22257890191. The next prime is 22257890219. The reversal of 22257890209 is 90209875222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21578141025 + 679749184 = 146895^2 + 26072^2 .

It is a cyclic number.

It is not a de Polignac number, because 22257890209 - 2⁹ = 22257889697 is a prime.

It is not a weakly prime, because it can be changed into another prime (22257890219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11128945104 + 11128945105.

It is an arithmetic number, because the mean of its divisors is an integer number (11128945105).

Almost surely, 2^22257890209 is an apocalyptic number.

It is an amenable number.

22257890209 is a deficient number, since it is larger than the sum of its proper divisors (1).

22257890209 is an equidigital number, since it uses as much as digits as its factorization.

22257890209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 22257890209 in words is "twenty-two billion, two hundred fifty-seven million, eight hundred ninety thousand, two hundred nine".