22397525 has 6 divisors (see below), whose sum is σ = 27772962. Its totient is φ = 17918000.

The previous prime is 22397519. The next prime is 22397533. The reversal of 22397525 is 52579322.

It can be written as a sum of positive squares in 3 ways, for example, as 2380849 + 20016676 = 1543^2 + 4474^2 .

It is not a de Polignac number, because 22397525 - 2⁴ = 22397509 is a prime.

It is a super-2 number, since 2×22397525² = 1003298252251250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 447926 + ... + 447975.

It is an arithmetic number, because the mean of its divisors is an integer number (4628827).

Almost surely, 2^22397525 is an apocalyptic number.

22397525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22397525 is a deficient number, since it is larger than the sum of its proper divisors (5375437).

22397525 is an equidigital number, since it uses as much as digits as its factorization.

22397525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895911 (or 895906 counting only the distinct ones).

The product of its digits is 37800, while the sum is 35.

The square root of 22397525 is about 4732.6023496592. The cubic root of 22397525 is about 281.8815667190.

It can be divided in two parts, 22397 and 525, that added together give a palindrome (22922).

The spelling of 22397525 in words is "twenty-two million, three hundred ninety-seven thousand, five hundred twenty-five".