313221540 has 24 divisors (see below), whose sum is σ = 877020480. Its totient is φ = 83525728.

The previous prime is 313221533. The next prime is 313221599. The reversal of 313221540 is 45122313.

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 7 ways as a sum of consecutive naturals, for example, 2610120 + ... + 2610239.

It is an arithmetic number, because the mean of its divisors is an integer number (36542520).

Almost surely, 2^313221540 is an apocalyptic number.

313221540 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

313221540 is an abundant number, since it is smaller than the sum of its proper divisors (563798940).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

313221540 is a wasteful number, since it uses less digits than its factorization.

313221540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5220371 (or 5220369 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 313221540 is about 17698.0659960347. The cubic root of 313221540 is about 679.1262855956.

Adding to 313221540 its reverse (45122313), we get a palindrome (358343853).

The spelling of 313221540 in words is "three hundred thirteen million, two hundred twenty-one thousand, five hundred forty".