442021322 has 4 divisors (see below), whose sum is σ = 663031986. Its totient is φ = 221010660.

The previous prime is 442021319. The next prime is 442021331. The reversal of 442021322 is 223120244.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 227135041 + 214886281 = 15071^2 + 14659^2 .

It is a junction number, because it is equal to n+sod(n) for n = 442021294 and 442021303.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110505329 + ... + 110505332.

Almost surely, 2^442021322 is an apocalyptic number.

442021322 is a deficient number, since it is larger than the sum of its proper divisors (221010664).

442021322 is a wasteful number, since it uses less digits than its factorization.

442021322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221010663.

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

The square root of 442021322 is about 21024.3031275712. The cubic root of 442021322 is about 761.7534088643.

Adding to 442021322 its reverse (223120244), we get a palindrome (665141566).

The spelling of 442021322 in words is "four hundred forty-two million, twenty-one thousand, three hundred twenty-two".