313012321 has 4 divisors (see below), whose sum is σ = 313591444. Its totient is φ = 312433200.

The previous prime is 313012303. The next prime is 313012331. The reversal of 313012321 is 123210313.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 238362721 + 74649600 = 15439^2 + 8640^2 .

It is a cyclic number.

It is not a de Polignac number, because 313012321 - 2¹³ = 313004129 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313012295 and 313012304.

It is not an unprimeable number, because it can be changed into a prime (313012331) 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, 288750 + ... + 289831.

It is an arithmetic number, because the mean of its divisors is an integer number (78397861).

Almost surely, 2^313012321 is an apocalyptic number.

It is an amenable number.

313012321 is a deficient number, since it is larger than the sum of its proper divisors (579123).

313012321 is an equidigital number, since it uses as much as digits as its factorization.

313012321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579122.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 313012321 is about 17692.1542215752. The cubic root of 313012321 is about 678.9750425170.

Adding to 313012321 its reverse (123210313), we get a palindrome (436222634).

It can be divided in two parts, 3130 and 12321, that added together give a palindrome (15451).

The spelling of 313012321 in words is "three hundred thirteen million, twelve thousand, three hundred twenty-one".