4352013221 has 4 divisors (see below), whose sum is σ = 4434126732. Its totient is φ = 4269899712.

The previous prime is 4352013191. The next prime is 4352013257. The reversal of 4352013221 is 1223102534.

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 1492972321 + 2859040900 = 38639^2 + 53470^2 .

It is a cyclic number.

It is not a de Polignac number, because 4352013221 - 2⁶ = 4352013157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4352013271) 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, 41056676 + ... + 41056781.

It is an arithmetic number, because the mean of its divisors is an integer number (1108531683).

Almost surely, 2^4352013221 is an apocalyptic number.

It is an amenable number.

4352013221 is a deficient number, since it is larger than the sum of its proper divisors (82113511).

4352013221 is an equidigital number, since it uses as much as digits as its factorization.

4352013221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82113510.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 4352013221 is about 65969.7902149158. The cubic root of 4352013221 is about 1632.6636940607.

Adding to 4352013221 its reverse (1223102534), we get a palindrome (5575115755).

The spelling of 4352013221 in words is "four billion, three hundred fifty-two million, thirteen thousand, two hundred twenty-one".