23287725 has 72 divisors (see below), whose sum is σ = 44684640. Its totient is φ = 11571840.

The previous prime is 23287717. The next prime is 23287729. The reversal of 23287725 is 52778232.

It is a happy number.

It is not a de Polignac number, because 23287725 - 2³ = 23287717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 23287725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23287729) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 280534 + ... + 280616.

It is an arithmetic number, because the mean of its divisors is an integer number (620620).

Almost surely, 2^23287725 is an apocalyptic number.

23287725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

23287725 is a deficient number, since it is larger than the sum of its proper divisors (21396915).

23287725 is a wasteful number, since it uses less digits than its factorization.

23287725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171 (or 163 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 23287725 is about 4825.7356952075. The cubic root of 23287725 is about 285.5676589912.

The spelling of 23287725 in words is "twenty-three million, two hundred eighty-seven thousand, seven hundred twenty-five".