172320463225 has 9 divisors (see below), whose sum is σ = 213679948143. Its totient is φ = 137854710120.

The previous prime is 172320463177. The next prime is 172320463279. The reversal of 172320463225 is 522364023271.

The square root of 172320463225 is 415115.

It is a perfect power (a square), and thus also a powerful number.

172320463225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 62035366761 + 110285096464 = 249069^2 + 332092^2 .

It is a de Polignac number, because none of the positive numbers 2^k-172320463225 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2034064 + ... + 2117086.

Almost surely, 2^172320463225 is an apocalyptic number.

172320463225 is the 415115-th square number.

172320463225 is the 207558-th centered octagonal number.

It is an amenable number.

172320463225 is a deficient number, since it is larger than the sum of its proper divisors (41359484918).

172320463225 is an frugal number, since it uses more digits than its factorization.

172320463225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166056 (or 83028 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 37.

Adding to 172320463225 its reverse (522364023271), we get a palindrome (694684486496).

The spelling of 172320463225 in words is "one hundred seventy-two billion, three hundred twenty million, four hundred sixty-three thousand, two hundred twenty-five".