313817681 has 16 divisors (see below), whose sum is σ = 339655680. Its totient is φ = 289090560.

The previous prime is 313817677. The next prime is 313817689. The reversal of 313817681 is 186718313.

It is a cyclic number.

It is not a de Polignac number, because 313817681 - 2² = 313817677 is a prime.

It is a super-2 number, since 2×313817681² = 196963073816435522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313817689) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165185 + ... + 167073.

It is an arithmetic number, because the mean of its divisors is an integer number (21228480).

Almost surely, 2^313817681 is an apocalyptic number.

313817681 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

313817681 is a deficient number, since it is larger than the sum of its proper divisors (25837999).

313817681 is a wasteful number, since it uses less digits than its factorization.

313817681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2176.

The product of its digits is 24192, while the sum is 38.

The square root of 313817681 is about 17714.8999714929. The cubic root of 313817681 is about 679.5568630995.

The spelling of 313817681 in words is "three hundred thirteen million, eight hundred seventeen thousand, six hundred eighty-one".