442445253 has 4 divisors (see below), whose sum is σ = 589927008. Its totient is φ = 294963500.

The previous prime is 442445249. The next prime is 442445293. The reversal of 442445253 is 352544244.

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 not a de Polignac number, because 442445253 - 2² = 442445249 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (442445243) 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 in 3 ways as a sum of consecutive naturals, for example, 73740873 + ... + 73740878.

It is an arithmetic number, because the mean of its divisors is an integer number (147481752).

Almost surely, 2^442445253 is an apocalyptic number.

It is an amenable number.

442445253 is a deficient number, since it is larger than the sum of its proper divisors (147481755).

442445253 is a wasteful number, since it uses less digits than its factorization.

442445253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147481754.

The product of its digits is 76800, while the sum is 33.

The square root of 442445253 is about 21034.3826389081. The cubic root of 442445253 is about 761.9968569252.

Adding to 442445253 its reverse (352544244), we get a palindrome (794989497).

The spelling of 442445253 in words is "four hundred forty-two million, four hundred forty-five thousand, two hundred fifty-three".