22156085957 has 2 divisors, whose sum is σ = 22156085958. Its totient is φ = 22156085956.

The previous prime is 22156085923. The next prime is 22156085983. The reversal of 22156085957 is 75958065122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21936868321 + 219217636 = 148111^2 + 14806^2 .

It is a cyclic number.

It is not a de Polignac number, because 22156085957 - 2⁶ = 22156085893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22156085257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11078042978 + 11078042979.

It is an arithmetic number, because the mean of its divisors is an integer number (11078042979).

Almost surely, 2^22156085957 is an apocalyptic number.

It is an amenable number.

22156085957 is a deficient number, since it is larger than the sum of its proper divisors (1).

22156085957 is an equidigital number, since it uses as much as digits as its factorization.

22156085957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512000, while the sum is 50.

The spelling of 22156085957 in words is "twenty-two billion, one hundred fifty-six million, eighty-five thousand, nine hundred fifty-seven".