316155317 has 4 divisors (see below), whose sum is σ = 316952076. Its totient is φ = 315358560.

The previous prime is 316155313. The next prime is 316155337. The reversal of 316155317 is 713551613.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 713551613 = 149 ⋅4788937.

It can be written as a sum of positive squares in 2 ways, for example, as 78039556 + 238115761 = 8834^2 + 15431^2 .

It is a cyclic number.

It is not a de Polignac number, because 316155317 - 2² = 316155313 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (316155313) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 397784 + ... + 398577.

It is an arithmetic number, because the mean of its divisors is an integer number (79238019).

Almost surely, 2^316155317 is an apocalyptic number.

It is an amenable number.

316155317 is a deficient number, since it is larger than the sum of its proper divisors (796759).

316155317 is an equidigital number, since it uses as much as digits as its factorization.

316155317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796758.

The product of its digits is 9450, while the sum is 32.

The square root of 316155317 is about 17780.7569298947. The cubic root of 316155317 is about 681.2400361924.

The spelling of 316155317 in words is "three hundred sixteen million, one hundred fifty-five thousand, three hundred seventeen".