22516825 has 6 divisors (see below), whose sum is σ = 27920894. Its totient is φ = 18013440.

The previous prime is 22516801. The next prime is 22516829. The reversal of 22516825 is 52861522.

It can be written as a sum of positive squares in 3 ways, for example, as 2374681 + 20142144 = 1541^2 + 4488^2 .

It is not a de Polignac number, because 22516825 - 2¹¹ = 22514777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22516829) 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 5 ways as a sum of consecutive naturals, for example, 450312 + ... + 450361.

Almost surely, 2^22516825 is an apocalyptic number.

22516825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22516825 is a deficient number, since it is larger than the sum of its proper divisors (5404069).

22516825 is an equidigital number, since it uses as much as digits as its factorization.

22516825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900683 (or 900678 counting only the distinct ones).

The product of its digits is 9600, while the sum is 31.

The square root of 22516825 is about 4745.1896695496. The cubic root of 22516825 is about 282.3811597146.

The spelling of 22516825 in words is "twenty-two million, five hundred sixteen thousand, eight hundred twenty-five".