22515289 has 2 divisors, whose sum is σ = 22515290. Its totient is φ = 22515288.

The previous prime is 22515257. The next prime is 22515299. The reversal of 22515289 is 98251522.

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., 15936064 + 6579225 = 3992^2 + 2565^2 .

It is a cyclic number.

It is not a de Polignac number, because 22515289 - 2⁵ = 22515257 is a prime.

It is not a weakly prime, because it can be changed into another prime (22515239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11257644 + 11257645.

It is an arithmetic number, because the mean of its divisors is an integer number (11257645).

Almost surely, 2^22515289 is an apocalyptic number.

It is an amenable number.

22515289 is a deficient number, since it is larger than the sum of its proper divisors (1).

22515289 is an equidigital number, since it uses as much as digits as its factorization.

22515289 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14400, while the sum is 34.

The square root of 22515289 is about 4745.0278186750. The cubic root of 22515289 is about 282.3747386299.

The spelling of 22515289 in words is "twenty-two million, five hundred fifteen thousand, two hundred eighty-nine".