442231249 has 2 divisors, whose sum is σ = 442231250. Its totient is φ = 442231248.

The previous prime is 442231247. The next prime is 442231259. The reversal of 442231249 is 942132244.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 290941249 + 151290000 = 17057^2 + 12300^2 .

It is a cyclic number.

It is not a de Polignac number, because 442231249 - 2¹ = 442231247 is a prime.

Together with 442231247, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 442231249.

It is not a weakly prime, because it can be changed into another prime (442231247) 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, 221115624 + 221115625.

It is an arithmetic number, because the mean of its divisors is an integer number (221115625).

Almost surely, 2^442231249 is an apocalyptic number.

It is an amenable number.

442231249 is a deficient number, since it is larger than the sum of its proper divisors (1).

442231249 is an equidigital number, since it uses as much as digits as its factorization.

442231249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13824, while the sum is 31.

The square root of 442231249 is about 21029.2950190918. The cubic root of 442231249 is about 761.8739817048.

The spelling of 442231249 in words is "four hundred forty-two million, two hundred thirty-one thousand, two hundred forty-nine".