426830221 has 4 divisors (see below), whose sum is σ = 427461372. Its totient is φ = 426199072.

The previous prime is 426830177. The next prime is 426830233. The reversal of 426830221 is 122038624.

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 346369321 + 80460900 = 18611^2 + 8970^2 .

It is a cyclic number.

It is not a de Polignac number, because 426830221 - 2¹⁷ = 426699149 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 426830221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426830281) 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, 314560 + ... + 315913.

It is an arithmetic number, because the mean of its divisors is an integer number (106865343).

Almost surely, 2^426830221 is an apocalyptic number.

It is an amenable number.

426830221 is a deficient number, since it is larger than the sum of its proper divisors (631151).

426830221 is an equidigital number, since it uses as much as digits as its factorization.

426830221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631150.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 426830221 is about 20659.8698204998. The cubic root of 426830221 is about 752.9250048913.

Adding to 426830221 its reverse (122038624), we get a palindrome (548868845).

The spelling of 426830221 in words is "four hundred twenty-six million, eight hundred thirty thousand, two hundred twenty-one".