23115225 has 24 divisors (see below), whose sum is σ = 43677760. Its totient is φ = 10566720.

The previous prime is 23115221. The next prime is 23115227. The reversal of 23115225 is 52251132.

It is not a de Polignac number, because 23115225 - 2² = 23115221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (23115221) 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 23 ways as a sum of consecutive naturals, for example, 21490 + ... + 22539.

Almost surely, 2^23115225 is an apocalyptic number.

23115225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23115225 is a deficient number, since it is larger than the sum of its proper divisors (20562535).

23115225 is a wasteful number, since it uses less digits than its factorization.

23115225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44049 (or 44044 counting only the distinct ones).

The product of its digits is 600, while the sum is 21.

The square root of 23115225 is about 4807.8295518872. The cubic root of 23115225 is about 284.8608123057.

Adding to 23115225 its reverse (52251132), we get a palindrome (75366357).

The spelling of 23115225 in words is "twenty-three million, one hundred fifteen thousand, two hundred twenty-five".