444023331421 has 4 divisors (see below), whose sum is σ = 449643880000. Its totient is φ = 438402782844.

The previous prime is 444023331413. The next prime is 444023331487. The reversal of 444023331421 is 124133320444.

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 444023331421 - 2³ = 444023331413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (444023331821) 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, 2810274171 + ... + 2810274328.

It is an arithmetic number, because the mean of its divisors is an integer number (112410970000).

Almost surely, 2^444023331421 is an apocalyptic number.

It is an amenable number.

444023331421 is a deficient number, since it is larger than the sum of its proper divisors (5620548579).

444023331421 is an equidigital number, since it uses as much as digits as its factorization.

444023331421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5620548578.

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 444023331421 its reverse (124133320444), we get a palindrome (568156651865).

The spelling of 444023331421 in words is "four hundred forty-four billion, twenty-three million, three hundred thirty-one thousand, four hundred twenty-one".