442216831 has 8 divisors (see below), whose sum is σ = 509249664. Its totient is φ = 376148760.

The previous prime is 442216823. The next prime is 442216909. The reversal of 442216831 is 138612244.

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 442216831 - 2³ = 442216823 is a prime.

It is a super-2 number, since 2×442216831² = 391111451239365122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442216793 and 442216802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442216231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240205 + ... + 242038.

It is an arithmetic number, because the mean of its divisors is an integer number (63656208).

Almost surely, 2^442216831 is an apocalyptic number.

442216831 is a deficient number, since it is larger than the sum of its proper divisors (67032833).

442216831 is a wasteful number, since it uses less digits than its factorization.

442216831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482381.

The product of its digits is 9216, while the sum is 31.

The square root of 442216831 is about 21028.9522088001. The cubic root of 442216831 is about 761.8657018599.

The spelling of 442216831 in words is "four hundred forty-two million, two hundred sixteen thousand, eight hundred thirty-one".