426299221 has 2 divisors, whose sum is σ = 426299222. Its totient is φ = 426299220.

The previous prime is 426299213. The next prime is 426299233. The reversal of 426299221 is 122992624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 341843121 + 84456100 = 18489^2 + 9190^2 .

It is a cyclic number.

It is not a de Polignac number, because 426299221 - 2³ = 426299213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426299261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213149610 + 213149611.

It is an arithmetic number, because the mean of its divisors is an integer number (213149611).

Almost surely, 2^426299221 is an apocalyptic number.

It is an amenable number.

426299221 is a deficient number, since it is larger than the sum of its proper divisors (1).

426299221 is an equidigital number, since it uses as much as digits as its factorization.

426299221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 426299221 is about 20647.0148205497. The cubic root of 426299221 is about 752.6126487796.

The spelling of 426299221 in words is "four hundred twenty-six million, two hundred ninety-nine thousand, two hundred twenty-one".