172513325 has 6 divisors (see below), whose sum is σ = 213916554. Its totient is φ = 138010640.

The previous prime is 172513303. The next prime is 172513349. The reversal of 172513325 is 523315271.

It can be written as a sum of positive squares in 3 ways, for example, as 37636 + 172475689 = 194^2 + 13133^2 .

It is not a de Polignac number, because 172513325 - 2¹⁶ = 172447789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3450242 + ... + 3450291.

It is an arithmetic number, because the mean of its divisors is an integer number (35652759).

Almost surely, 2^172513325 is an apocalyptic number.

It is an amenable number.

172513325 is a deficient number, since it is larger than the sum of its proper divisors (41403229).

172513325 is an equidigital number, since it uses as much as digits as its factorization.

172513325 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6900543 (or 6900538 counting only the distinct ones).

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

The square root of 172513325 is about 13134.4328008483. The cubic root of 172513325 is about 556.6824739237.

Adding to 172513325 its reverse (523315271), we get a palindrome (695828596).

The spelling of 172513325 in words is "one hundred seventy-two million, five hundred thirteen thousand, three hundred twenty-five".