442221231 has 8 divisors (see below), whose sum is σ = 608648704. Its totient is φ = 285303960.

The previous prime is 442221217. The next prime is 442221233. The reversal of 442221231 is 132122244.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 442221231 - 2¹³ = 442213039 is a prime.

It is a super-2 number, since 2×442221231² = 391119234294310722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442221198 and 442221207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442221233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2377441 + ... + 2377626.

It is an arithmetic number, because the mean of its divisors is an integer number (76081088).

Almost surely, 2^442221231 is an apocalyptic number.

442221231 is a deficient number, since it is larger than the sum of its proper divisors (166427473).

442221231 is a wasteful number, since it uses less digits than its factorization.

442221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4755101.

The product of its digits is 768, while the sum is 21.

The square root of 442221231 is about 21029.0568262107. The cubic root of 442221231 is about 761.8682286731.

Adding to 442221231 its reverse (132122244), we get a palindrome (574343475).

The spelling of 442221231 in words is "four hundred forty-two million, two hundred twenty-one thousand, two hundred thirty-one".