313816021 has 8 divisors (see below), whose sum is σ = 327175200. Its totient is φ = 300732432.

The previous prime is 313816003. The next prime is 313816031. The reversal of 313816021 is 120618313.

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 313816021 - 2²⁵ = 280261589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313816031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66571 + ... + 71128.

It is an arithmetic number, because the mean of its divisors is an integer number (40896900).

Almost surely, 2^313816021 is an apocalyptic number.

It is an amenable number.

313816021 is a deficient number, since it is larger than the sum of its proper divisors (13359179).

313816021 is a wasteful number, since it uses less digits than its factorization.

313816021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137795.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 313816021 is about 17714.8531182169. The cubic root of 313816021 is about 679.5556648810. Note that the first 3 decimals are identical.

The spelling of 313816021 in words is "three hundred thirteen million, eight hundred sixteen thousand, twenty-one".