23215025 has 12 divisors (see below), whose sum is σ = 29276400. Its totient is φ = 18256080.

The previous prime is 23215009. The next prime is 23215079. The reversal of 23215025 is 52051232.

It is not a de Polignac number, because 23215025 - 2⁴ = 23215009 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 23214988 and 23215006.

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, 6395 + ... + 9344.

It is an arithmetic number, because the mean of its divisors is an integer number (2439700).

Almost surely, 2^23215025 is an apocalyptic number.

23215025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23215025 is a deficient number, since it is larger than the sum of its proper divisors (6061375).

23215025 is a wasteful number, since it uses less digits than its factorization.

23215025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15808 (or 15803 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 23215025 is about 4818.1972769906. The cubic root of 23215025 is about 285.2701859644.

Adding to 23215025 its reverse (52051232), we get a palindrome (75266257).

The spelling of 23215025 in words is "twenty-three million, two hundred fifteen thousand, twenty-five".