15597225 has 48 divisors (see below), whose sum is σ = 32755840. Its totient is φ = 7128000.

The previous prime is 15597223. The next prime is 15597227. The reversal of 15597225 is 52279551.

It is an interprime number because it is at equal distance from previous prime (15597223) and next prime (15597227).

It is not a de Polignac number, because 15597225 - 2¹ = 15597223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 15597225.

It is not an unprimeable number, because it can be changed into a prime (15597221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3075 + ... + 6375.

Almost surely, 2^15597225 is an apocalyptic number.

15597225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

15597225 is an abundant number, since it is smaller than the sum of its proper divisors (17158615).

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

15597225 is a wasteful number, since it uses less digits than its factorization.

15597225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327 (or 3316 counting only the distinct ones).

The product of its digits is 31500, while the sum is 36.

The square root of 15597225 is about 3949.3322220345. The cubic root of 15597225 is about 249.8517788059.

The spelling of 15597225 in words is "fifteen million, five hundred ninety-seven thousand, two hundred twenty-five".