444121231 has 4 divisors (see below), whose sum is σ = 444324672. Its totient is φ = 443917792.

The previous prime is 444121229. The next prime is 444121241. The reversal of 444121231 is 132121444.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 444121231 - 2¹ = 444121229 is a prime.

It is a super-2 number, since 2×444121231² = 394487335649910722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444121201) 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, 98410 + ... + 102823.

It is an arithmetic number, because the mean of its divisors is an integer number (111081168).

Almost surely, 2^444121231 is an apocalyptic number.

444121231 is a deficient number, since it is larger than the sum of its proper divisors (203441).

444121231 is a wasteful number, since it uses less digits than its factorization.

444121231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203440.

The product of its digits is 768, while the sum is 22.

The square root of 444121231 is about 21074.1839936924. The cubic root of 444121231 is about 762.9577899898.

Adding to 444121231 its reverse (132121444), we get a palindrome (576242675).

The spelling of 444121231 in words is "four hundred forty-four million, one hundred twenty-one thousand, two hundred thirty-one".