316721265 has 32 divisors (see below), whose sum is σ = 597835776. Its totient is φ = 140114880.

The previous prime is 316721239. The next prime is 316721287. The reversal of 316721265 is 562127613.

It is not a de Polignac number, because 316721265 - 2⁵ = 316721233 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 45397 + ... + 51906.

It is an arithmetic number, because the mean of its divisors is an integer number (18682368).

Almost surely, 2^316721265 is an apocalyptic number.

316721265 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

316721265 is a deficient number, since it is larger than the sum of its proper divisors (281114511).

316721265 is a wasteful number, since it uses less digits than its factorization.

316721265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97349.

The product of its digits is 15120, while the sum is 33.

The square root of 316721265 is about 17796.6644346630. The cubic root of 316721265 is about 681.6462886353.

Adding to 316721265 its reverse (562127613), we get a palindrome (878848878).

The spelling of 316721265 in words is "three hundred sixteen million, seven hundred twenty-one thousand, two hundred sixty-five".