3520434221 has 2 divisors, whose sum is σ = 3520434222. Its totient is φ = 3520434220.

The previous prime is 3520434217. The next prime is 3520434223. The reversal of 3520434221 is 1224340253.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2471581225 + 1048852996 = 49715^2 + 32386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3520434221 - 2² = 3520434217 is a prime.

Together with 3520434223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3520434223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1760217110 + 1760217111.

It is an arithmetic number, because the mean of its divisors is an integer number (1760217111).

Almost surely, 2^3520434221 is an apocalyptic number.

It is an amenable number.

3520434221 is a deficient number, since it is larger than the sum of its proper divisors (1).

3520434221 is an equidigital number, since it uses as much as digits as its factorization.

3520434221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 3520434221 is about 59333.2471806491. The cubic root of 3520434221 is about 1521.2435318017.

Adding to 3520434221 its reverse (1224340253), we get a palindrome (4744774474).

The spelling of 3520434221 in words is "three billion, five hundred twenty million, four hundred thirty-four thousand, two hundred twenty-one".