4313513221 has 2 divisors, whose sum is σ = 4313513222. Its totient is φ = 4313513220.

The previous prime is 4313513213. The next prime is 4313513227. The reversal of 4313513221 is 1223153134.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2921402500 + 1392110721 = 54050^2 + 37311^2 .

It is a cyclic number.

It is not a de Polignac number, because 4313513221 - 2³ = 4313513213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4313513227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2156756610 + 2156756611.

It is an arithmetic number, because the mean of its divisors is an integer number (2156756611).

Almost surely, 2^4313513221 is an apocalyptic number.

It is an amenable number.

4313513221 is a deficient number, since it is larger than the sum of its proper divisors (1).

4313513221 is an equidigital number, since it uses as much as digits as its factorization.

4313513221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 25.

The square root of 4313513221 is about 65677.3417625896. The cubic root of 4313513221 is about 1627.8349844164.

Adding to 4313513221 its reverse (1223153134), we get a palindrome (5536666355).

The spelling of 4313513221 in words is "four billion, three hundred thirteen million, five hundred thirteen thousand, two hundred twenty-one".