6413372221 has 2 divisors, whose sum is σ = 6413372222. Its totient is φ = 6413372220.

The previous prime is 6413372209. The next prime is 6413372227. The reversal of 6413372221 is 1222733146.

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., 6398240121 + 15132100 = 79989^2 + 3890^2 .

It is a cyclic number.

It is not a de Polignac number, because 6413372221 - 2²¹ = 6411275069 is a prime.

It is a super-2 number, since 2×6413372221² = 82262686490188945682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6413372227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3206686110 + 3206686111.

It is an arithmetic number, because the mean of its divisors is an integer number (3206686111).

Almost surely, 2^6413372221 is an apocalyptic number.

It is an amenable number.

6413372221 is a deficient number, since it is larger than the sum of its proper divisors (1).

6413372221 is an equidigital number, since it uses as much as digits as its factorization.

6413372221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 31.

The square root of 6413372221 is about 80083.5327704766. The cubic root of 6413372221 is about 1857.9277245503.

The spelling of 6413372221 in words is "six billion, four hundred thirteen million, three hundred seventy-two thousand, two hundred twenty-one".