316866542281 has 3 divisors (see below), whose sum is σ = 316867105191. Its totient is φ = 316865979372.

The previous prime is 316866542257. The next prime is 316866542287. The reversal of 316866542281 is 182245668613.

The square root of 316866542281 is 562909.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 305929565881 + 10936976400 = 553109^2 + 104580^2 .

It is not a de Polignac number, because 316866542281 - 2⁵ = 316866542249 is a prime.

It is a super-2 number, since 2×316866542281² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (316866542287) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 281455 + ... + 844363.

It is an arithmetic number, because the mean of its divisors is an integer number (105622368397).

Almost surely, 2^316866542281 is an apocalyptic number.

316866542281 is the 562909-th square number.

316866542281 is the 281455-th centered octagonal number.

It is an amenable number.

316866542281 is a deficient number, since it is larger than the sum of its proper divisors (562910).

316866542281 is an frugal number, since it uses more digits than its factorization.

316866542281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1125818 (or 562909 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 52.

The spelling of 316866542281 in words is "three hundred sixteen billion, eight hundred sixty-six million, five hundred forty-two thousand, two hundred eighty-one".