442021223 has 8 divisors (see below), whose sum is σ = 505638048. Its totient is φ = 378522144.

The previous prime is 442021213. The next prime is 442021241. The reversal of 442021223 is 322120244.

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

It is not a de Polignac number, because 442021223 - 2⁸ = 442020967 is a prime.

It is a super-3 number, since 3×442021223³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 442021195 and 442021204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442021213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21236 + ... + 36537.

It is an arithmetic number, because the mean of its divisors is an integer number (63204756).

Almost surely, 2^442021223 is an apocalyptic number.

442021223 is a deficient number, since it is larger than the sum of its proper divisors (63616825).

442021223 is a wasteful number, since it uses less digits than its factorization.

442021223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58873.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 442021223 is about 21024.3007731530. The cubic root of 442021223 is about 761.7533519940.

Adding to 442021223 its reverse (322120244), we get a palindrome (764141467).

It can be divided in two parts, 442021 and 223, that added together give a palindrome (442244).

The spelling of 442021223 in words is "four hundred forty-two million, twenty-one thousand, two hundred twenty-three".