444224321 has 4 divisors (see below), whose sum is σ = 444312000. Its totient is φ = 444136644.

The previous prime is 444224309. The next prime is 444224329. The reversal of 444224321 is 123422444.

It is a happy number.

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 not a de Polignac number, because 444224321 - 2¹⁸ = 443962177 is a prime.

It is a super-2 number, since 2×444224321² = 394670494735822082, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444224329) 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, 35741 + ... + 46538.

It is an arithmetic number, because the mean of its divisors is an integer number (111078000).

Almost surely, 2^444224321 is an apocalyptic number.

It is an amenable number.

444224321 is a deficient number, since it is larger than the sum of its proper divisors (87679).

444224321 is an equidigital number, since it uses as much as digits as its factorization.

444224321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87678.

The product of its digits is 6144, while the sum is 26.

The square root of 444224321 is about 21076.6297353253. The cubic root of 444224321 is about 763.0168183423.

Adding to 444224321 its reverse (123422444), we get a palindrome (567646765).

The spelling of 444224321 in words is "four hundred forty-four million, two hundred twenty-four thousand, three hundred twenty-one".