22625557 has 2 divisors, whose sum is σ = 22625558. Its totient is φ = 22625556.

The previous prime is 22625531. The next prime is 22625569. The reversal of 22625557 is 75552622.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21446161 + 1179396 = 4631^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 22625557 - 2¹⁵ = 22592789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22625857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11312778 + 11312779.

It is an arithmetic number, because the mean of its divisors is an integer number (11312779).

Almost surely, 2^22625557 is an apocalyptic number.

It is an amenable number.

22625557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22625557 is an equidigital number, since it uses as much as digits as its factorization.

22625557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 42000, while the sum is 34.

The square root of 22625557 is about 4756.6329477899. The cubic root of 22625557 is about 282.8349622707.

The spelling of 22625557 in words is "twenty-two million, six hundred twenty-five thousand, five hundred fifty-seven".