313351321 has 4 divisors (see below), whose sum is σ = 315454500. Its totient is φ = 311248144.

The previous prime is 313351307. The next prime is 313351331. The reversal of 313351321 is 123153313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 205606921 + 107744400 = 14339^2 + 10380^2 .

It is a cyclic number.

It is not a de Polignac number, because 313351321 - 2⁹ = 313350809 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313351292 and 313351301.

It is not an unprimeable number, because it can be changed into a prime (313351331) 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, 1051366 + ... + 1051663.

It is an arithmetic number, because the mean of its divisors is an integer number (78863625).

Almost surely, 2^313351321 is an apocalyptic number.

It is an amenable number.

313351321 is a deficient number, since it is larger than the sum of its proper divisors (2103179).

313351321 is a wasteful number, since it uses less digits than its factorization.

313351321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2103178.

The product of its digits is 810, while the sum is 22.

The square root of 313351321 is about 17701.7321468833. The cubic root of 313351321 is about 679.2200696078.

The spelling of 313351321 in words is "three hundred thirteen million, three hundred fifty-one thousand, three hundred twenty-one".