442444513 has 4 divisors (see below), whose sum is σ = 505650880. Its totient is φ = 379238148.

The previous prime is 442444463. The next prime is 442444573. The reversal of 442444513 is 315444244.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-442444513 is a prime.

It is not an unprimeable number, because it can be changed into a prime (442444573) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31603173 + ... + 31603186.

It is an arithmetic number, because the mean of its divisors is an integer number (126412720).

Almost surely, 2^442444513 is an apocalyptic number.

It is an amenable number.

442444513 is a deficient number, since it is larger than the sum of its proper divisors (63206367).

442444513 is an equidigital number, since it uses as much as digits as its factorization.

442444513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63206366.

The product of its digits is 30720, while the sum is 31.

The square root of 442444513 is about 21034.3650486531. The cubic root of 442444513 is about 761.9964321058.

Adding to 442444513 its reverse (315444244), we get a palindrome (757888757).

The spelling of 442444513 in words is "four hundred forty-two million, four hundred forty-four thousand, five hundred thirteen".