22507725 has 24 divisors (see below), whose sum is σ = 37731712. Its totient is φ = 11836800.

The previous prime is 22507657. The next prime is 22507739. The reversal of 22507725 is 52770522.

It is not a de Polignac number, because 22507725 - 2⁸ = 22507469 is a prime.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22507692 and 22507701.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3420 + ... + 7530.

Almost surely, 2^22507725 is an apocalyptic number.

22507725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22507725 is a deficient number, since it is larger than the sum of its proper divisors (15223987).

22507725 is a wasteful number, since it uses less digits than its factorization.

22507725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4197 (or 4192 counting only the distinct ones).

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 22507725 is about 4744.2307068691. The cubic root of 22507725 is about 282.3431138711.

It can be divided in two parts, 22507 and 725, that added together give a palindrome (23232).

The spelling of 22507725 in words is "twenty-two million, five hundred seven thousand, seven hundred twenty-five".