15797225 has 6 divisors (see below), whose sum is σ = 19588590. Its totient is φ = 12637760.

The previous prime is 15797207. The next prime is 15797237. The reversal of 15797225 is 52279751.

It can be written as a sum of positive squares in 3 ways, for example, as 1817104 + 13980121 = 1348^2 + 3739^2 .

It is not a de Polignac number, because 15797225 - 2⁶ = 15797161 is a prime.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 315920 + ... + 315969.

It is an arithmetic number, because the mean of its divisors is an integer number (3264765).

Almost surely, 2^15797225 is an apocalyptic number.

It is an amenable number.

15797225 is a deficient number, since it is larger than the sum of its proper divisors (3791365).

15797225 is an equidigital number, since it uses as much as digits as its factorization.

15797225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631899 (or 631894 counting only the distinct ones).

The product of its digits is 44100, while the sum is 38.

The square root of 15797225 is about 3974.5723040347. The cubic root of 15797225 is about 250.9151790346.

The spelling of 15797225 in words is "fifteen million, seven hundred ninety-seven thousand, two hundred twenty-five".