15575625 has 80 divisors (see below), whose sum is σ = 31489920. Its totient is φ = 7560000.

The previous prime is 15575617. The next prime is 15575627. The reversal of 15575625 is 52657551.

It is a happy number.

It is not a de Polignac number, because 15575625 - 2³ = 15575617 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 15575625.

It is not an unprimeable number, because it can be changed into a prime (15575627) 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 79 ways as a sum of consecutive naturals, for example, 219340 + ... + 219410.

It is an arithmetic number, because the mean of its divisors is an integer number (393624).

Almost surely, 2^15575625 is an apocalyptic number.

15575625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15575625 is an abundant number, since it is smaller than the sum of its proper divisors (15914295).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15575625 is an equidigital number, since it uses as much as digits as its factorization.

15575625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113 (or 92 counting only the distinct ones).

The product of its digits is 52500, while the sum is 36.

The square root of 15575625 is about 3946.5966350769. The cubic root of 15575625 is about 249.7363888009.

The spelling of 15575625 in words is "fifteen million, five hundred seventy-five thousand, six hundred twenty-five".