442020243 has 16 divisors (see below), whose sum is σ = 673885440. Its totient is φ = 252458976.

The previous prime is 442020209. The next prime is 442020251. The reversal of 442020243 is 342020244.

It is not a de Polignac number, because 442020243 - 2¹² = 442016147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (442020203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54796 + ... + 62342.

It is an arithmetic number, because the mean of its divisors is an integer number (42117840).

Almost surely, 2^442020243 is an apocalyptic number.

442020243 is a deficient number, since it is larger than the sum of its proper divisors (231865197).

442020243 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (442020242) it forms an eRAP, since the sums of their prime factors are consecutive (10345 and 10346).

442020243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10346.

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 442020243 is about 21024.2774667764. The cubic root of 442020243 is about 761.7527890355.

Adding to 442020243 its reverse (342020244), we get a palindrome (784040487).

Subtracting from 442020243 its reverse (342020244), we obtain a palindrome (99999999).

The spelling of 442020243 in words is "four hundred forty-two million, twenty thousand, two hundred forty-three".