201443042 has 4 divisors (see below), whose sum is σ = 302164566. Its totient is φ = 100721520.

The previous prime is 201443041. The next prime is 201443057. The reversal of 201443042 is 240344102.

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

It can be written as a sum of positive squares in only one way, i.e., 101022601 + 100420441 = 10051^2 + 10021^2 .

It is not an unprimeable number, because it can be changed into a prime (201443041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50360759 + ... + 50360762.

Almost surely, 2^201443042 is an apocalyptic number.

201443042 is a deficient number, since it is larger than the sum of its proper divisors (100721524).

201443042 is a wasteful number, since it uses less digits than its factorization.

201443042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100721523.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 201443042 is about 14193.0631647999. The cubic root of 201443042 is about 586.2066718902.

Adding to 201443042 its reverse (240344102), we get a palindrome (441787144).

The spelling of 201443042 in words is "two hundred one million, four hundred forty-three thousand, forty-two".