313321516 has 12 divisors (see below), whose sum is σ = 550352880. Its totient is φ = 156077840.

The previous prime is 313321507. The next prime is 313321537. The reversal of 313321516 is 615123313.

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, 144520 + ... + 146671.

It is an arithmetic number, because the mean of its divisors is an integer number (45862740).

Almost surely, 2^313321516 is an apocalyptic number.

It is an amenable number.

313321516 is a deficient number, since it is larger than the sum of its proper divisors (237031364).

313321516 is a wasteful number, since it uses less digits than its factorization.

313321516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291464 (or 291462 counting only the distinct ones).

The product of its digits is 1620, while the sum is 25.

The square root of 313321516 is about 17700.8902600971. The cubic root of 313321516 is about 679.1985338270.

Adding to 313321516 its reverse (615123313), we get a palindrome (928444829).

It can be divided in two parts, 3133 and 21516, that added together give a square (24649 = 157²).

The spelling of 313321516 in words is "three hundred thirteen million, three hundred twenty-one thousand, five hundred sixteen".