22655531 has 2 divisors, whose sum is σ = 22655532. Its totient is φ = 22655530.

The previous prime is 22655519. The next prime is 22655557. The reversal of 22655531 is 13555622.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22655531 - 2²² = 18461227 is a prime.

It is a super-2 number, since 2×22655531² = 1026546169783922, which contains 22 as substring.

It is equal to p_1427861 and since 22655531 and 1427861 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 22655494 and 22655503.

It is not a weakly prime, because it can be changed into another prime (22625531) 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, 11327765 + 11327766.

It is an arithmetic number, because the mean of its divisors is an integer number (11327766).

Almost surely, 2^22655531 is an apocalyptic number.

22655531 is a deficient number, since it is larger than the sum of its proper divisors (1).

22655531 is an equidigital number, since it uses as much as digits as its factorization.

22655531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9000, while the sum is 29.

The square root of 22655531 is about 4759.7826631055. The cubic root of 22655531 is about 282.9598056680.

Subtracting from 22655531 its reverse (13555622), we obtain a palindrome (9099909).

The spelling of 22655531 in words is "twenty-two million, six hundred fifty-five thousand, five hundred thirty-one".