442022231 has 4 divisors (see below), whose sum is σ = 505168272. Its totient is φ = 378876192.

The previous prime is 442022209. The next prime is 442022233. The reversal of 442022231 is 132220244.

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

It is a cyclic number.

It is not a de Polignac number, because 442022231 - 2⁶ = 442022167 is a prime.

It is a super-2 number, since 2×442022231² = 390767305396434722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442022233) 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, 31573010 + ... + 31573023.

It is an arithmetic number, because the mean of its divisors is an integer number (126292068).

Almost surely, 2^442022231 is an apocalyptic number.

442022231 is a deficient number, since it is larger than the sum of its proper divisors (63146041).

442022231 is an equidigital number, since it uses as much as digits as its factorization.

442022231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63146040.

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

The square root of 442022231 is about 21024.3247453991. The cubic root of 442022231 is about 761.7539310362.

Adding to 442022231 its reverse (132220244), we get a palindrome (574242475).

The spelling of 442022231 in words is "four hundred forty-two million, twenty-two thousand, two hundred thirty-one".