15317225 has 48 divisors (see below), whose sum is σ = 24224640. Its totient is φ = 9331200.

The previous prime is 15317219. The next prime is 15317227. The reversal of 15317225 is 52271351.

It is not a de Polignac number, because 15317225 - 2⁸ = 15316969 is a prime.

15317225 is a Rhonda number in base 10.

Its product of digits (2100) is a multiple of the sum of its prime factors (210).

It is a junction number, because it is equal to n+sod(n) for n = 15317194 and 15317203.

It is not an unprimeable number, because it can be changed into a prime (15317227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 140471 + ... + 140579.

It is an arithmetic number, because the mean of its divisors is an integer number (504680).

Almost surely, 2^15317225 is an apocalyptic number.

It is an amenable number.

15317225 is a deficient number, since it is larger than the sum of its proper divisors (8907415).

15317225 is a wasteful number, since it uses less digits than its factorization.

15317225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 205 counting only the distinct ones).

The product of its digits is 2100, while the sum is 26.

The square root of 15317225 is about 3913.7226524116. The cubic root of 15317225 is about 248.3476361695.

Adding to 15317225 its reverse (52271351), we get a palindrome (67588576).

The spelling of 15317225 in words is "fifteen million, three hundred seventeen thousand, two hundred twenty-five".