426002221 has 2 divisors, whose sum is σ = 426002222. Its totient is φ = 426002220.

The previous prime is 426002197. The next prime is 426002233. The reversal of 426002221 is 122200624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 239816196 + 186186025 = 15486^2 + 13645^2 .

It is a cyclic number.

It is not a de Polignac number, because 426002221 - 2¹¹ = 426000173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426002261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213001110 + 213001111.

It is an arithmetic number, because the mean of its divisors is an integer number (213001111).

Almost surely, 2^426002221 is an apocalyptic number.

It is an amenable number.

426002221 is a deficient number, since it is larger than the sum of its proper divisors (1).

426002221 is an equidigital number, since it uses as much as digits as its factorization.

426002221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 426002221 is about 20639.8212443810. The cubic root of 426002221 is about 752.4378280000.

Adding to 426002221 its reverse (122200624), we get a palindrome (548202845).

The spelling of 426002221 in words is "four hundred twenty-six million, two thousand, two hundred twenty-one".