671313256 has 16 divisors (see below), whose sum is σ = 1275956100. Its totient is φ = 331058304.

The previous prime is 671313217. The next prime is 671313281. The reversal of 671313256 is 652313176.

It can be written as a sum of positive squares in 2 ways, for example, as 669256900 + 2056356 = 25870^2 + 1434^2 .

It is a super-2 number, since 2×671313256² = 901322975362643072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 574171 + ... + 575338.

Almost surely, 2^671313256 is an apocalyptic number.

It is an amenable number.

671313256 is a deficient number, since it is larger than the sum of its proper divisors (604642844).

671313256 is a wasteful number, since it uses less digits than its factorization.

671313256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149588 (or 1149584 counting only the distinct ones).

The product of its digits is 22680, while the sum is 34.

The square root of 671313256 is about 25909.7135453096. The cubic root of 671313256 is about 875.6053524214.

The spelling of 671313256 in words is "six hundred seventy-one million, three hundred thirteen thousand, two hundred fifty-six".