442572731 has 2 divisors, whose sum is σ = 442572732. Its totient is φ = 442572730.

The previous prime is 442572701. The next prime is 442572733. The reversal of 442572731 is 137275244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442572731 - 2¹⁰ = 442571707 is a prime.

It is a super-2 number, since 2×442572731² = 391741244449596722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 442572733, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 442572691 and 442572700.

It is not a weakly prime, because it can be changed into another prime (442572733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221286365 + 221286366.

It is an arithmetic number, because the mean of its divisors is an integer number (221286366).

Almost surely, 2^442572731 is an apocalyptic number.

442572731 is a deficient number, since it is larger than the sum of its proper divisors (1).

442572731 is an equidigital number, since it uses as much as digits as its factorization.

442572731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 35.

The square root of 442572731 is about 21037.4126498484. The cubic root of 442572731 is about 762.0700324627.

The spelling of 442572731 in words is "four hundred forty-two million, five hundred seventy-two thousand, seven hundred thirty-one".