17312225 has 12 divisors (see below), whose sum is σ = 24534144. Its totient is φ = 11871120.

The previous prime is 17312221. The next prime is 17312231. The reversal of 17312225 is 52221371.

It is a happy number.

It is not a de Polignac number, because 17312225 - 2² = 17312221 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 17312225.

It is not an unprimeable number, because it can be changed into a prime (17312221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 49289 + ... + 49638.

It is an arithmetic number, because the mean of its divisors is an integer number (2044512).

Almost surely, 2^17312225 is an apocalyptic number.

It is an amenable number.

17312225 is a deficient number, since it is larger than the sum of its proper divisors (7221919).

17312225 is an equidigital number, since it uses as much as digits as its factorization.

17312225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98944 (or 98939 counting only the distinct ones).

The product of its digits is 840, while the sum is 23.

The square root of 17312225 is about 4160.7961978448. The cubic root of 17312225 is about 258.6927728623.

Adding to 17312225 its reverse (52221371), we get a palindrome (69533596).

The spelling of 17312225 in words is "seventeen million, three hundred twelve thousand, two hundred twenty-five".