22515125 has 16 divisors (see below), whose sum is σ = 28242864. Its totient is φ = 17920000.

The previous prime is 22515121. The next prime is 22515127. The reversal of 22515125 is 52151522.

It can be written as a sum of positive squares in 8 ways, for example, as 1739761 + 20775364 = 1319^2 + 4558^2 .

It is not a de Polignac number, because 22515125 - 2² = 22515121 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 22515125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22515121) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34805 + ... + 35445.

It is an arithmetic number, because the mean of its divisors is an integer number (1765179).

Almost surely, 2^22515125 is an apocalyptic number.

22515125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22515125 is a deficient number, since it is larger than the sum of its proper divisors (5727739).

22515125 is an equidigital number, since it uses as much as digits as its factorization.

22515125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 937 (or 927 counting only the distinct ones).

The product of its digits is 1000, while the sum is 23.

The square root of 22515125 is about 4745.0105373961. The cubic root of 22515125 is about 282.3740530281.

Adding to 22515125 its reverse (52151522), we get a palindrome (74666647).

The spelling of 22515125 in words is "twenty-two million, five hundred fifteen thousand, one hundred twenty-five".