444325521 has 4 divisors (see below), whose sum is σ = 592434032. Its totient is φ = 296217012.

The previous prime is 444325457. The next prime is 444325537. The reversal of 444325521 is 125523444.

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 not a de Polignac number, because 444325521 - 2⁶ = 444325457 is a prime.

It is a super-2 number, since 2×444325521² = 394850337223842882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (444325561) 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, 74054251 + ... + 74054256.

It is an arithmetic number, because the mean of its divisors is an integer number (148108508).

Almost surely, 2^444325521 is an apocalyptic number.

It is an amenable number.

444325521 is a deficient number, since it is larger than the sum of its proper divisors (148108511).

444325521 is a wasteful number, since it uses less digits than its factorization.

444325521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148108510.

The product of its digits is 19200, while the sum is 30.

The square root of 444325521 is about 21079.0303619498. The cubic root of 444325521 is about 763.0747556166.

Adding to 444325521 its reverse (125523444), we get a palindrome (569848965).

The spelling of 444325521 in words is "four hundred forty-four million, three hundred twenty-five thousand, five hundred twenty-one".