22515255 has 36 divisors (see below), whose sum is σ = 45402552. Its totient is φ = 10291680.

The previous prime is 22515239. The next prime is 22515257. The reversal of 22515255 is 55251522.

It is not a de Polignac number, because 22515255 - 2⁴ = 22515239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22515257) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2901 + ... + 7310.

It is an arithmetic number, because the mean of its divisors is an integer number (1261182).

Almost surely, 2^22515255 is an apocalyptic number.

22515255 is an abundant number, since it is smaller than the sum of its proper divisors (22887297).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22515255 is a wasteful number, since it uses less digits than its factorization.

22515255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10236 (or 10226 counting only the distinct ones).

The product of its digits is 5000, while the sum is 27.

The square root of 22515255 is about 4745.0242359760. The cubic root of 22515255 is about 282.3745964932.

Adding to 22515255 its reverse (55251522), we get a palindrome (77766777).

The spelling of 22515255 in words is "twenty-two million, five hundred fifteen thousand, two hundred fifty-five".