23639225 has 12 divisors (see below), whose sum is σ = 29716476. Its totient is φ = 18650880.

The previous prime is 23639159. The next prime is 23639233. The reversal of 23639225 is 52293632.

23639225 = 524² + 525² + ... + 598².

It can be written as a sum of positive squares in 6 ways, for example, as 2699449 + 20939776 = 1643^2 + 4576^2 .

It is not a de Polignac number, because 23639225 - 2⁸ = 23638969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23639191 and 23639200.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 4652 + ... + 8301.

It is an arithmetic number, because the mean of its divisors is an integer number (2476373).

Almost surely, 2^23639225 is an apocalyptic number.

23639225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23639225 is a deficient number, since it is larger than the sum of its proper divisors (6077251).

23639225 is a wasteful number, since it uses less digits than its factorization.

23639225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13036 (or 13031 counting only the distinct ones).

The product of its digits is 19440, while the sum is 32.

The square root of 23639225 is about 4862.0186137036. The cubic root of 23639225 is about 286.9972562231.

The spelling of 23639225 in words is "twenty-three million, six hundred thirty-nine thousand, two hundred twenty-five".