426344221 has 4 divisors (see below), whose sum is σ = 426387744. Its totient is φ = 426300700.

The previous prime is 426344201. The next prime is 426344231. The reversal of 426344221 is 122443624.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 426344221 - 2¹⁵ = 426311453 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 426344221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426344201) 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, 576 + ... + 29206.

It is an arithmetic number, because the mean of its divisors is an integer number (106596936).

Almost surely, 2^426344221 is an apocalyptic number.

It is an amenable number.

426344221 is a deficient number, since it is larger than the sum of its proper divisors (43523).

426344221 is a wasteful number, since it uses less digits than its factorization.

426344221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43522.

The product of its digits is 9216, while the sum is 28.

The square root of 426344221 is about 20648.1045377051. The cubic root of 426344221 is about 752.6391296924.

Adding to 426344221 its reverse (122443624), we get a palindrome (548787845).

It can be divided in two parts, 4263 and 44221, that added together give a palindrome (48484).

The spelling of 426344221 in words is "four hundred twenty-six million, three hundred forty-four thousand, two hundred twenty-one".