313221999 has 8 divisors (see below), whose sum is σ = 417985920. Its totient is φ = 208636376.

The previous prime is 313221949. The next prime is 313222003. The reversal of 313221999 is 999122313.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 313221999 - 2⁷ = 313221871 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313221949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40419 + ... + 47540.

It is an arithmetic number, because the mean of its divisors is an integer number (52248240).

Almost surely, 2^313221999 is an apocalyptic number.

313221999 is a deficient number, since it is larger than the sum of its proper divisors (104763921).

313221999 is a wasteful number, since it uses less digits than its factorization.

313221999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89149.

The product of its digits is 26244, while the sum is 39.

The square root of 313221999 is about 17698.0789635486. The cubic root of 313221999 is about 679.1266173297.

The spelling of 313221999 in words is "three hundred thirteen million, two hundred twenty-one thousand, nine hundred ninety-nine".