442923331 has 2 divisors, whose sum is σ = 442923332. Its totient is φ = 442923330.

The previous prime is 442923301. The next prime is 442923359. The reversal of 442923331 is 133329244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442923331 - 2²⁷ = 308705603 is a prime.

It is a super-2 number, since 2×442923331² = 392362154288271122, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 442923293 and 442923302.

It is not a weakly prime, because it can be changed into another prime (442923301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221461665 + 221461666.

It is an arithmetic number, because the mean of its divisors is an integer number (221461666).

Almost surely, 2^442923331 is an apocalyptic number.

442923331 is a deficient number, since it is larger than the sum of its proper divisors (1).

442923331 is an equidigital number, since it uses as much as digits as its factorization.

442923331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 31.

The square root of 442923331 is about 21045.7437739796. The cubic root of 442923331 is about 762.2712131299.

The spelling of 442923331 in words is "four hundred forty-two million, nine hundred twenty-three thousand, three hundred thirty-one".