316289161 has 8 divisors (see below), whose sum is σ = 320098184. Its totient is φ = 312491520.

The previous prime is 316289159. The next prime is 316289191. The reversal of 316289161 is 161982613.

It is the 7261-st star number.

It can be written as a sum of positive squares in 4 ways, for example, as 54464400 + 261824761 = 7380^2 + 16181^2 .

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

It is a 3-Lehmer number, since φ(316289161) divides (316289161-1)³.

It is a cyclic number.

It is not a de Polignac number, because 316289161 - 2¹ = 316289159 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 316289161.

It is not an unprimeable number, because it can be changed into a prime (316289191) 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, 61651 + ... + 66583.

It is an arithmetic number, because the mean of its divisors is an integer number (40012273).

Almost surely, 2^316289161 is an apocalyptic number.

It is an amenable number.

316289161 is a deficient number, since it is larger than the sum of its proper divisors (3809023).

316289161 is an equidigital number, since it uses as much as digits as its factorization.

316289161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691.

The product of its digits is 15552, while the sum is 37.

The square root of 316289161 is about 17784.5202634201. The cubic root of 316289161 is about 681.3361566987.

The spelling of 316289161 in words is "three hundred sixteen million, two hundred eighty-nine thousand, one hundred sixty-one".