313424021 has 4 divisors (see below), whose sum is σ = 313610412. Its totient is φ = 313237632.

The previous prime is 313424017. The next prime is 313424051. The reversal of 313424021 is 120424313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120424313 = 9257 ⋅13009.

It can be written as a sum of positive squares in 2 ways, for example, as 260338225 + 53085796 = 16135^2 + 7286^2 .

It is a cyclic number.

It is not a de Polignac number, because 313424021 - 2² = 313424017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313423984 and 313424002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313424051) 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, 90650 + ... + 94043.

It is an arithmetic number, because the mean of its divisors is an integer number (78402603).

Almost surely, 2^313424021 is an apocalyptic number.

It is an amenable number.

313424021 is a deficient number, since it is larger than the sum of its proper divisors (186391).

313424021 is a wasteful number, since it uses less digits than its factorization.

313424021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186390.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 313424021 is about 17703.7854991524. The cubic root of 313424021 is about 679.2725936997.

Adding to 313424021 its reverse (120424313), we get a palindrome (433848334).

The spelling of 313424021 in words is "three hundred thirteen million, four hundred twenty-four thousand, twenty-one".