172316517 has 8 divisors (see below), whose sum is σ = 230329920. Its totient is φ = 114590400.

The previous prime is 172316513. The next prime is 172316527. The reversal of 172316517 is 715613271.

172316517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 172316517 - 2² = 172316513 is a prime.

It is a super-2 number, since 2×172316517² = 59385964062022578, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172316513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70417 + ... + 72822.

It is an arithmetic number, because the mean of its divisors is an integer number (28791240).

Almost surely, 2^172316517 is an apocalyptic number.

It is an amenable number.

172316517 is a deficient number, since it is larger than the sum of its proper divisors (58013403).

172316517 is a wasteful number, since it uses less digits than its factorization.

172316517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143643.

The product of its digits is 8820, while the sum is 33.

The square root of 172316517 is about 13126.9385996888. The cubic root of 172316517 is about 556.4707004204.

Adding to 172316517 its reverse (715613271), we get a palindrome (887929788).

The spelling of 172316517 in words is "one hundred seventy-two million, three hundred sixteen thousand, five hundred seventeen".