22615289 has 2 divisors, whose sum is σ = 22615290. Its totient is φ = 22615288.

The previous prime is 22615267. The next prime is 22615297. The reversal of 22615289 is 98251622.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19404025 + 3211264 = 4405^2 + 1792^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22615289 is a prime.

It is a super-2 number, since 2×22615289² = 1022902593107042, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (22615889) 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, 11307644 + 11307645.

It is an arithmetic number, because the mean of its divisors is an integer number (11307645).

Almost surely, 2^22615289 is an apocalyptic number.

It is an amenable number.

22615289 is a deficient number, since it is larger than the sum of its proper divisors (1).

22615289 is an equidigital number, since it uses as much as digits as its factorization.

22615289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 35.

The square root of 22615289 is about 4755.5534903942. The cubic root of 22615289 is about 282.7921701187.

The spelling of 22615289 in words is "twenty-two million, six hundred fifteen thousand, two hundred eighty-nine".