313221332 has 12 divisors (see below), whose sum is σ = 550921140. Its totient is φ = 155815296.

The previous prime is 313221313. The next prime is 313221343. The reversal of 313221332 is 233122313.

313221332 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 251032336 + 62188996 = 15844^2 + 7886^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 197957 + ... + 199532.

It is an arithmetic number, because the mean of its divisors is an integer number (45910095).

Almost surely, 2^313221332 is an apocalyptic number.

It is an amenable number.

313221332 is a deficient number, since it is larger than the sum of its proper divisors (237699808).

313221332 is a wasteful number, since it uses less digits than its factorization.

313221332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397690 (or 397688 counting only the distinct ones).

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

The square root of 313221332 is about 17698.0601196854. The cubic root of 313221332 is about 679.1261352672.

Adding to 313221332 its reverse (233122313), we get a palindrome (546343645).

The spelling of 313221332 in words is "three hundred thirteen million, two hundred twenty-one thousand, three hundred thirty-two".