313813281 has 4 divisors (see below), whose sum is σ = 418417712. Its totient is φ = 209208852.

The previous prime is 313813273. The next prime is 313813301. The reversal of 313813281 is 182318313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 182318313 = 3 ⋅60772771.

It is not a de Polignac number, because 313813281 - 2³ = 313813273 is a prime.

It is a super-2 number, since 2×313813281² = 196957550663969922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313813231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 52302211 + ... + 52302216.

It is an arithmetic number, because the mean of its divisors is an integer number (104604428).

Almost surely, 2^313813281 is an apocalyptic number.

It is an amenable number.

313813281 is a deficient number, since it is larger than the sum of its proper divisors (104604431).

313813281 is a wasteful number, since it uses less digits than its factorization.

313813281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104604430.

The product of its digits is 3456, while the sum is 30.

The square root of 313813281 is about 17714.7757818156. The cubic root of 313813281 is about 679.5536870896.

The spelling of 313813281 in words is "three hundred thirteen million, eight hundred thirteen thousand, two hundred eighty-one".