442312231 has 4 divisors (see below), whose sum is σ = 447911200. Its totient is φ = 436713264.

The previous prime is 442312219. The next prime is 442312237. The reversal of 442312231 is 132213244.

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

It is a de Polignac number, because none of the positive numbers 2^k-442312231 is a prime.

It is a super-2 number, since 2×442312231² = 391280219384394722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442312237) 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, 2799366 + ... + 2799523.

It is an arithmetic number, because the mean of its divisors is an integer number (111977800).

Almost surely, 2^442312231 is an apocalyptic number.

442312231 is a deficient number, since it is larger than the sum of its proper divisors (5598969).

442312231 is an equidigital number, since it uses as much as digits as its factorization.

442312231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5598968.

The product of its digits is 1152, while the sum is 22.

The square root of 442312231 is about 21031.2203877949. The cubic root of 442312231 is about 761.9204840066.

Adding to 442312231 its reverse (132213244), we get a palindrome (574525475).

The spelling of 442312231 in words is "four hundred forty-two million, three hundred twelve thousand, two hundred thirty-one".