22712725 has 18 divisors (see below), whose sum is σ = 32763714. Its totient is φ = 15573600.

The previous prime is 22712693. The next prime is 22712741. The reversal of 22712725 is 52721722.

It can be written as a sum of positive squares in 3 ways, for example, as 1238769 + 21473956 = 1113^2 + 4634^2 .

It is not a de Polignac number, because 22712725 - 2⁵ = 22712693 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22712693 and 22712702.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8046 + ... + 10495.

Almost surely, 2^22712725 is an apocalyptic number.

22712725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22712725 is a deficient number, since it is larger than the sum of its proper divisors (10050989).

22712725 is a wasteful number, since it uses less digits than its factorization.

22712725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18565 (or 18553 counting only the distinct ones).

The product of its digits is 3920, while the sum is 28.

The square root of 22712725 is about 4765.7869234786. The cubic root of 22712725 is about 283.1977167203.

The spelling of 22712725 in words is "twenty-two million, seven hundred twelve thousand, seven hundred twenty-five".