22512825 has 18 divisors (see below), whose sum is σ = 40323374. Its totient is φ = 12006720.

The previous prime is 22512823. The next prime is 22512829. The reversal of 22512825 is 52821522.

It can be written as a sum of positive squares in 3 ways, for example, as 1279161 + 21233664 = 1131^2 + 4608^2 .

It is not a de Polignac number, because 22512825 - 2¹ = 22512823 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22512821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 49804 + ... + 50253.

Almost surely, 2^22512825 is an apocalyptic number.

22512825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22512825 is a deficient number, since it is larger than the sum of its proper divisors (17810549).

22512825 is a wasteful number, since it uses less digits than its factorization.

22512825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100073 (or 100065 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 22512825 is about 4744.7681713652. The cubic root of 22512825 is about 282.3644375298.

The spelling of 22512825 in words is "twenty-two million, five hundred twelve thousand, eight hundred twenty-five".