424322221 has 4 divisors (see below), whose sum is σ = 424433152. Its totient is φ = 424211292.

The previous prime is 424322207. The next prime is 424322257. The reversal of 424322221 is 122223424.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424322221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 424322192 and 424322201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (424322201) 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, 49515 + ... + 57448.

It is an arithmetic number, because the mean of its divisors is an integer number (106108288).

Almost surely, 2^424322221 is an apocalyptic number.

It is an amenable number.

424322221 is a deficient number, since it is larger than the sum of its proper divisors (110931).

424322221 is a wasteful number, since it uses less digits than its factorization.

424322221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110930.

The product of its digits is 1536, while the sum is 22.

The square root of 424322221 is about 20599.0830135713. The cubic root of 424322221 is about 751.4474099128.

Adding to 424322221 its reverse (122223424), we get a palindrome (546545645).

The spelling of 424322221 in words is "four hundred twenty-four million, three hundred twenty-two thousand, two hundred twenty-one".