172316513 has 2 divisors, whose sum is σ = 172316514. Its totient is φ = 172316512.

The previous prime is 172316479. The next prime is 172316527. The reversal of 172316513 is 315613271.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164660224 + 7656289 = 12832^2 + 2767^2 .

It is an emirp because it is prime and its reverse (315613271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172316513 - 2⁸ = 172316257 is a prime.

It is not a weakly prime, because it can be changed into another prime (172316593) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86158256 + 86158257.

It is an arithmetic number, because the mean of its divisors is an integer number (86158257).

Almost surely, 2^172316513 is an apocalyptic number.

It is an amenable number.

172316513 is a deficient number, since it is larger than the sum of its proper divisors (1).

172316513 is an equidigital number, since it uses as much as digits as its factorization.

172316513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 29.

The square root of 172316513 is about 13126.9384473304. The cubic root of 172316513 is about 556.4706961146.

Adding to 172316513 its reverse (315613271), we get a palindrome (487929784).

The spelling of 172316513 in words is "one hundred seventy-two million, three hundred sixteen thousand, five hundred thirteen".