313204421 has 2 divisors, whose sum is σ = 313204422. Its totient is φ = 313204420.

The previous prime is 313204393. The next prime is 313204433. The reversal of 313204421 is 124402313.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 294808900 + 18395521 = 17170^2 + 4289^2 .

It is a cyclic number.

It is not a de Polignac number, because 313204421 - 2²⁶ = 246095557 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 313204393 and 313204402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (313204471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156602210 + 156602211.

It is an arithmetic number, because the mean of its divisors is an integer number (156602211).

Almost surely, 2^313204421 is an apocalyptic number.

It is an amenable number.

313204421 is a deficient number, since it is larger than the sum of its proper divisors (1).

313204421 is an equidigital number, since it uses as much as digits as its factorization.

313204421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 313204421 is about 17697.5823490103. The cubic root of 313204421 is about 679.1139129102.

Adding to 313204421 its reverse (124402313), we get a palindrome (437606734).

The spelling of 313204421 in words is "three hundred thirteen million, two hundred four thousand, four hundred twenty-one".