3420255221 has 4 divisors (see below), whose sum is σ = 3423756972. Its totient is φ = 3416753472.

The previous prime is 3420255199. The next prime is 3420255257. The reversal of 3420255221 is 1225520243.

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 2238614596 + 1181640625 = 47314^2 + 34375^2 .

It is a cyclic number.

It is not a de Polignac number, because 3420255221 - 2¹⁸ = 3419993077 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 (3420255271) 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, 1749410 + ... + 1751363.

It is an arithmetic number, because the mean of its divisors is an integer number (855939243).

Almost surely, 2^3420255221 is an apocalyptic number.

It is an amenable number.

3420255221 is a deficient number, since it is larger than the sum of its proper divisors (3501751).

3420255221 is an equidigital number, since it uses as much as digits as its factorization.

3420255221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3501750.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 3420255221 is about 58482.9481216534. The cubic root of 3420255221 is about 1506.6747317672.

Adding to 3420255221 its reverse (1225520243), we get a palindrome (4645775464).

The spelling of 3420255221 in words is "three billion, four hundred twenty million, two hundred fifty-five thousand, two hundred twenty-one".