22512425 has 24 divisors (see below), whose sum is σ = 30378264. Its totient is φ = 16450560.

The previous prime is 22512421. The next prime is 22512431. The reversal of 22512425 is 52421522.

It can be written as a sum of positive squares in 12 ways, for example, as 22005481 + 506944 = 4691^2 + 712^2 .

It is not a de Polignac number, because 22512425 - 2² = 22512421 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22512425.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22512421) 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, 36419 + ... + 37031.

It is an arithmetic number, because the mean of its divisors is an integer number (1265761).

Almost surely, 2^22512425 is an apocalyptic number.

22512425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22512425 is a deficient number, since it is larger than the sum of its proper divisors (7865839).

22512425 is a wasteful number, since it uses less digits than its factorization.

22512425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 749 (or 744 counting only the distinct ones).

The product of its digits is 1600, while the sum is 23.

The square root of 22512425 is about 4744.7260194873. The cubic root of 22512425 is about 282.3627652023.

Adding to 22512425 its reverse (52421522), we get a palindrome (74933947).

The spelling of 22512425 in words is "twenty-two million, five hundred twelve thousand, four hundred twenty-five".