22765257 has 6 divisors (see below), whose sum is σ = 32883162. Its totient is φ = 15176832.

The previous prime is 22765241. The next prime is 22765271. The reversal of 22765257 is 75256722.

It can be written as a sum of positive squares in only one way, i.e., 22099401 + 665856 = 4701^2 + 816^2 .

It is not a de Polignac number, because 22765257 - 2⁴ = 22765241 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22765217) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1264728 + ... + 1264745.

It is an arithmetic number, because the mean of its divisors is an integer number (5480527).

Almost surely, 2^22765257 is an apocalyptic number.

It is an amenable number.

22765257 is a deficient number, since it is larger than the sum of its proper divisors (10117905).

22765257 is a wasteful number, since it uses less digits than its factorization.

22765257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2529479 (or 2529476 counting only the distinct ones).

The product of its digits is 58800, while the sum is 36.

The square root of 22765257 is about 4771.2951072010. The cubic root of 22765257 is about 283.4158835204.

The spelling of 22765257 in words is "twenty-two million, seven hundred sixty-five thousand, two hundred fifty-seven".