172130431013 has 2 divisors, whose sum is σ = 172130431014. Its totient is φ = 172130431012.

The previous prime is 172130430961. The next prime is 172130431091. The reversal of 172130431013 is 310134031271.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 106411006849 + 65719424164 = 326207^2 + 256358^2 .

It is an emirp because it is prime and its reverse (310134031271) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 172130431013 - 2⁸ = 172130430757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (172130436013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86065215506 + 86065215507.

It is an arithmetic number, because the mean of its divisors is an integer number (86065215507).

Almost surely, 2^172130431013 is an apocalyptic number.

It is an amenable number.

172130431013 is a deficient number, since it is larger than the sum of its proper divisors (1).

172130431013 is an equidigital number, since it uses as much as digits as its factorization.

172130431013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 26.

Adding to 172130431013 its reverse (310134031271), we get a palindrome (482264462284).

The spelling of 172130431013 in words is "one hundred seventy-two billion, one hundred thirty million, four hundred thirty-one thousand, thirteen".