313221001 has 4 divisors (see below), whose sum is σ = 316994832. Its totient is φ = 309447172.

The previous prime is 313220981. The next prime is 313221011. The reversal of 313221001 is 100122313.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 313221001 - 2¹⁵ = 313188233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313221011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1886791 + ... + 1886956.

It is an arithmetic number, because the mean of its divisors is an integer number (79248708).

Almost surely, 2^313221001 is an apocalyptic number.

It is an amenable number.

313221001 is a deficient number, since it is larger than the sum of its proper divisors (3773831).

313221001 is an equidigital number, since it uses as much as digits as its factorization.

313221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3773830.

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 313221001 is about 17698.0507683756. The cubic root of 313221001 is about 679.1258960425.

Adding to 313221001 its reverse (100122313), we get a palindrome (413343314).

It can be divided in two parts, 31322 and 1001, that added together give a palindrome (32323).

The spelling of 313221001 in words is "three hundred thirteen million, two hundred twenty-one thousand, one".