15316625 has 8 divisors (see below), whose sum is σ = 19115304. Its totient is φ = 12253200.

The previous prime is 15316619. The next prime is 15316627. The reversal of 15316625 is 52661351.

It can be written as a sum of positive squares in 4 ways, for example, as 1803649 + 13512976 = 1343^2 + 3676^2 .

It is not a de Polignac number, because 15316625 - 2⁸ = 15316369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (15316627) 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 7 ways as a sum of consecutive naturals, for example, 61142 + ... + 61391.

It is an arithmetic number, because the mean of its divisors is an integer number (2389413).

Almost surely, 2^15316625 is an apocalyptic number.

It is an amenable number.

15316625 is a deficient number, since it is larger than the sum of its proper divisors (3798679).

15316625 is an equidigital number, since it uses as much as digits as its factorization.

15316625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122548 (or 122538 counting only the distinct ones).

The product of its digits is 5400, while the sum is 29.

The square root of 15316625 is about 3913.6459982988. The cubic root of 15316625 is about 248.3443934036.

Adding to 15316625 its reverse (52661351), we get a palindrome (67977976).

It can be divided in two parts, 15316 and 625, that multiplied together give a triangular number (9572500 = T₄₃₇₅).

The spelling of 15316625 in words is "fifteen million, three hundred sixteen thousand, six hundred twenty-five".