23815225 has 18 divisors (see below), whose sum is σ = 34354014. Its totient is φ = 16329600.

The previous prime is 23815201. The next prime is 23815241. The reversal of 23815225 is 52251832.

It can be written as a sum of positive squares in 3 ways, for example, as 283024 + 23532201 = 532^2 + 4851^2 .

It is not a de Polignac number, because 23815225 - 2¹³ = 23807033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 23815193 and 23815202.

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 17 ways as a sum of consecutive naturals, for example, 8496 + ... + 10945.

Almost surely, 2^23815225 is an apocalyptic number.

23815225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23815225 is a deficient number, since it is larger than the sum of its proper divisors (10538789).

23815225 is a wasteful number, since it uses less digits than its factorization.

23815225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19465 (or 19453 counting only the distinct ones).

The product of its digits is 4800, while the sum is 28.

The square root of 23815225 is about 4880.0845279565. The cubic root of 23815225 is about 287.7077515410.

The spelling of 23815225 in words is "twenty-three million, eight hundred fifteen thousand, two hundred twenty-five".