22497725 has 24 divisors (see below), whose sum is σ = 29248128. Its totient is φ = 17148800.

The previous prime is 22497721. The next prime is 22497733. The reversal of 22497725 is 52779422.

It is not a de Polignac number, because 22497725 - 2² = 22497721 is a prime.

It is a super-2 number, since 2×22497725² = 1012295260351250, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

Its product of digits (70560) is a multiple of the sum of its prime divisors (560).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22497721) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47942 + ... + 48408.

It is an arithmetic number, because the mean of its divisors is an integer number (1218672).

Almost surely, 2^22497725 is an apocalyptic number.

22497725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22497725 is a deficient number, since it is larger than the sum of its proper divisors (6750403).

22497725 is a wasteful number, since it uses less digits than its factorization.

22497725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565 (or 560 counting only the distinct ones).

The product of its digits is 70560, while the sum is 38.

The square root of 22497725 is about 4743.1766781346. The cubic root of 22497725 is about 282.3012934238.

The spelling of 22497725 in words is "twenty-two million, four hundred ninety-seven thousand, seven hundred twenty-five".