442450221 has 4 divisors (see below), whose sum is σ = 589933632. Its totient is φ = 294966812.

The previous prime is 442450193. The next prime is 442450291. The reversal of 442450221 is 122054244.

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 442450221 - 2⁵ = 442450189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 442450191 and 442450200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442450291) 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, 73741701 + ... + 73741706.

It is an arithmetic number, because the mean of its divisors is an integer number (147483408).

Almost surely, 2^442450221 is an apocalyptic number.

It is an amenable number.

442450221 is a deficient number, since it is larger than the sum of its proper divisors (147483411).

442450221 is a wasteful number, since it uses less digits than its factorization.

442450221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147483410.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 442450221 is about 21034.5007309420. The cubic root of 442450221 is about 761.9997089438. Note that the first 3 decimals are identical.

It can be divided in two parts, 4424 and 50221, that added together give a palindrome (54645).

The spelling of 442450221 in words is "four hundred forty-two million, four hundred fifty thousand, two hundred twenty-one".