313332221 has 16 divisors (see below), whose sum is σ = 334430208. Its totient is φ = 293084400.

The previous prime is 313332203. The next prime is 313332251. The reversal of 313332221 is 122233313.

It is a cyclic number.

It is not a de Polignac number, because 313332221 - 2⁶ = 313332157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313332193 and 313332202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313332251) 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, 119636 + ... + 122226.

It is an arithmetic number, because the mean of its divisors is an integer number (20901888).

Almost surely, 2^313332221 is an apocalyptic number.

313332221 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

It is an amenable number.

313332221 is a deficient number, since it is larger than the sum of its proper divisors (21097987).

313332221 is a wasteful number, since it uses less digits than its factorization.

313332221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752.

The product of its digits is 648, while the sum is 20.

The square root of 313332221 is about 17701.1926434351. The cubic root of 313332221 is about 679.2062689459.

Adding to 313332221 its reverse (122233313), we get a palindrome (435565534).

The spelling of 313332221 in words is "three hundred thirteen million, three hundred thirty-two thousand, two hundred twenty-one".