316656161 has 8 divisors (see below), whose sum is σ = 343461384. Its totient is φ = 290759680.

The previous prime is 316656149. The next prime is 316656181. The reversal of 316656161 is 161656613.

It can be written as a sum of positive squares in 4 ways, for example, as 1380625 + 315275536 = 1175^2 + 17756^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 316656161 - 2²² = 312461857 is a prime.

It is a super-2 number, since 2×316656161² = 200542248598515842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316656181) 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, 226460 + ... + 227853.

It is an arithmetic number, because the mean of its divisors is an integer number (42932673).

Almost surely, 2^316656161 is an apocalyptic number.

It is an amenable number.

316656161 is a deficient number, since it is larger than the sum of its proper divisors (26805223).

316656161 is a wasteful number, since it uses less digits than its factorization.

316656161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 454371.

The product of its digits is 19440, while the sum is 35.

The square root of 316656161 is about 17794.8352338537. The cubic root of 316656161 is about 681.5995799086.

The spelling of 316656161 in words is "three hundred sixteen million, six hundred fifty-six thousand, one hundred sixty-one".