22519957 has 2 divisors, whose sum is σ = 22519958. Its totient is φ = 22519956.

The previous prime is 22519943. The next prime is 22519963. The reversal of 22519957 is 75991522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20557156 + 1962801 = 4534^2 + 1401^2 .

It is a cyclic number.

It is not a de Polignac number, because 22519957 - 2¹¹ = 22517909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22519907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11259978 + 11259979.

It is an arithmetic number, because the mean of its divisors is an integer number (11259979).

Almost surely, 2^22519957 is an apocalyptic number.

It is an amenable number.

22519957 is a deficient number, since it is larger than the sum of its proper divisors (1).

22519957 is an equidigital number, since it uses as much as digits as its factorization.

22519957 is an evil number, because the sum of its binary digits is even.

The product of its digits is 56700, while the sum is 40.

The square root of 22519957 is about 4745.5196764949. The cubic root of 22519957 is about 282.3942518030.

The spelling of 22519957 in words is "twenty-two million, five hundred nineteen thousand, nine hundred fifty-seven".