6416226221 has 2 divisors, whose sum is σ = 6416226222. Its totient is φ = 6416226220.

The previous prime is 6416226127. The next prime is 6416226233. The reversal of 6416226221 is 1226226146.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4018165321 + 2398060900 = 63389^2 + 48970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6416226221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6416220221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3208113110 + 3208113111.

It is an arithmetic number, because the mean of its divisors is an integer number (3208113111).

Almost surely, 2^6416226221 is an apocalyptic number.

It is an amenable number.

6416226221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6416226221 is an equidigital number, since it uses as much as digits as its factorization.

6416226221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 6416226221 is about 80101.3496827613. The cubic root of 6416226221 is about 1858.2032810585.

The spelling of 6416226221 in words is "six billion, four hundred sixteen million, two hundred twenty-six thousand, two hundred twenty-one".