442332021 has 8 divisors (see below), whose sum is σ = 615418560. Its totient is φ = 282066752.

The previous prime is 442332019. The next prime is 442332083. The reversal of 442332021 is 120233244.

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

It is a cyclic number.

It is not a de Polignac number, because 442332021 - 2¹ = 442332019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442332221) 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, 3205236 + ... + 3205373.

It is an arithmetic number, because the mean of its divisors is an integer number (76927320).

Almost surely, 2^442332021 is an apocalyptic number.

It is an amenable number.

442332021 is a deficient number, since it is larger than the sum of its proper divisors (173086539).

442332021 is a wasteful number, since it uses less digits than its factorization.

442332021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6410635.

The product of its (nonzero) digits is 1152, while the sum is 21.

The square root of 442332021 is about 21031.6908735365. The cubic root of 442332021 is about 761.9318471572.

Adding to 442332021 its reverse (120233244), we get a palindrome (562565265).

The spelling of 442332021 in words is "four hundred forty-two million, three hundred thirty-two thousand, twenty-one".