173531225 has 12 divisors (see below), whose sum is σ = 245918784. Its totient is φ = 118992720.

The previous prime is 173531167. The next prime is 173531227. The reversal of 173531225 is 522135371.

173531225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 173531225 - 2²⁶ = 106422361 is a prime.

It is a super-2 number, since 2×173531225² = 60226172100001250, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (173531227) 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, 495629 + ... + 495978.

It is an arithmetic number, because the mean of its divisors is an integer number (20493232).

Almost surely, 2^173531225 is an apocalyptic number.

It is an amenable number.

173531225 is a deficient number, since it is larger than the sum of its proper divisors (72387559).

173531225 is an equidigital number, since it uses as much as digits as its factorization.

173531225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 991624 (or 991619 counting only the distinct ones).

The product of its digits is 6300, while the sum is 29.

The square root of 173531225 is about 13173.1251037861. The cubic root of 173531225 is about 557.7752131756.

Adding to 173531225 its reverse (522135371), we get a palindrome (695666596).

The spelling of 173531225 in words is "one hundred seventy-three million, five hundred thirty-one thousand, two hundred twenty-five".