22256957 has 2 divisors, whose sum is σ = 22256958. Its totient is φ = 22256956.

The previous prime is 22256951. The next prime is 22256987. The reversal of 22256957 is 75965222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11978521 + 10278436 = 3461^2 + 3206^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22256957 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22256957.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22256951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11128478 + 11128479.

It is an arithmetic number, because the mean of its divisors is an integer number (11128479).

Almost surely, 2^22256957 is an apocalyptic number.

It is an amenable number.

22256957 is a deficient number, since it is larger than the sum of its proper divisors (1).

22256957 is an equidigital number, since it uses as much as digits as its factorization.

22256957 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 22256957 is about 4717.7279489178. The cubic root of 22256957 is about 281.2906277440.

The spelling of 22256957 in words is "twenty-two million, two hundred fifty-six thousand, nine hundred fifty-seven".