22265557 has 2 divisors, whose sum is σ = 22265558. Its totient is φ = 22265556.

The previous prime is 22265543. The next prime is 22265561. The reversal of 22265557 is 75556222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19412836 + 2852721 = 4406^2 + 1689^2 .

It is a cyclic number.

It is not a de Polignac number, because 22265557 - 2¹¹ = 22263509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22265567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11132778 + 11132779.

It is an arithmetic number, because the mean of its divisors is an integer number (11132779).

Almost surely, 2^22265557 is an apocalyptic number.

It is an amenable number.

22265557 is a deficient number, since it is larger than the sum of its proper divisors (1).

22265557 is an equidigital number, since it uses as much as digits as its factorization.

22265557 is an evil number, because the sum of its binary digits is even.

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

The square root of 22265557 is about 4718.6393165827. The cubic root of 22265557 is about 281.3268529400.

It can be divided in two parts, 22265 and 557, that added together give a palindrome (22822).

The spelling of 22265557 in words is "twenty-two million, two hundred sixty-five thousand, five hundred fifty-seven".