23522225 has 6 divisors (see below), whose sum is σ = 29167590. Its totient is φ = 18817760.

The previous prime is 23522189. The next prime is 23522227. The reversal of 23522225 is 52222532.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2582449 + 20939776 = 1607^2 + 4576^2 .

It is not a de Polignac number, because 23522225 - 2²⁴ = 6745009 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23522225.

It is not an unprimeable number, because it can be changed into a prime (23522227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 470420 + ... + 470469.

It is an arithmetic number, because the mean of its divisors is an integer number (4861265).

Almost surely, 2^23522225 is an apocalyptic number.

23522225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23522225 is a deficient number, since it is larger than the sum of its proper divisors (5645365).

23522225 is an equidigital number, since it uses as much as digits as its factorization.

23522225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940899 (or 940894 counting only the distinct ones).

The product of its digits is 2400, while the sum is 23.

The square root of 23522225 is about 4849.9716494017. The cubic root of 23522225 is about 286.5229847538.

Adding to 23522225 its reverse (52222532), we get a palindrome (75744757).

The spelling of 23522225 in words is "twenty-three million, five hundred twenty-two thousand, two hundred twenty-five".