317190521 has 2 divisors, whose sum is σ = 317190522. Its totient is φ = 317190520.

The previous prime is 317190499. The next prime is 317190527. The reversal of 317190521 is 125091713.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 196981225 + 120209296 = 14035^2 + 10964^2 .

It is a cyclic number.

It is not a de Polignac number, because 317190521 - 2¹⁰ = 317189497 is a prime.

It is a super-2 number, since 2×317190521² = 201219653224502882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (317190527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 158595260 + 158595261.

It is an arithmetic number, because the mean of its divisors is an integer number (158595261).

Almost surely, 2^317190521 is an apocalyptic number.

It is an amenable number.

317190521 is a deficient number, since it is larger than the sum of its proper divisors (1).

317190521 is an equidigital number, since it uses as much as digits as its factorization.

317190521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1890, while the sum is 29.

The square root of 317190521 is about 17809.8433738200. The cubic root of 317190521 is about 681.9827661673.

The spelling of 317190521 in words is "three hundred seventeen million, one hundred ninety thousand, five hundred twenty-one".