442320203 has 4 divisors (see below), whose sum is σ = 476344848. Its totient is φ = 408295560.

The previous prime is 442320187. The next prime is 442320239. The reversal of 442320203 is 302023244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442320203 - 2⁴ = 442320187 is a prime.

It is a super-2 number, since 2×442320203² = 391294323963922418, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442320253) 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, 17012303 + ... + 17012328.

It is an arithmetic number, because the mean of its divisors is an integer number (119086212).

Almost surely, 2^442320203 is an apocalyptic number.

442320203 is a deficient number, since it is larger than the sum of its proper divisors (34024645).

442320203 is a wasteful number, since it uses less digits than its factorization.

442320203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34024644.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 442320203 is about 21031.4099146966. The cubic root of 442320203 is about 761.9250614621.

Adding to 442320203 its reverse (302023244), we get a palindrome (744343447).

The spelling of 442320203 in words is "four hundred forty-two million, three hundred twenty thousand, two hundred three".