442440331 has 2 divisors, whose sum is σ = 442440332. Its totient is φ = 442440330.

The previous prime is 442440319. The next prime is 442440337. The reversal of 442440331 is 133044244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442440331 - 2⁹ = 442439819 is a prime.

It is a super-2 number, since 2×442440331² = 391506892990779122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 442440296 and 442440305.

It is not a weakly prime, because it can be changed into another prime (442440337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221220165 + 221220166.

It is an arithmetic number, because the mean of its divisors is an integer number (221220166).

Almost surely, 2^442440331 is an apocalyptic number.

442440331 is a deficient number, since it is larger than the sum of its proper divisors (1).

442440331 is an equidigital number, since it uses as much as digits as its factorization.

442440331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 442440331 is about 21034.2656396652. The cubic root of 442440331 is about 761.9940312932.

Adding to 442440331 its reverse (133044244), we get a palindrome (575484575).

The spelling of 442440331 in words is "four hundred forty-two million, four hundred forty thousand, three hundred thirty-one".