201442143 has 32 divisors (see below), whose sum is σ = 321818112. Its totient is φ = 109670400.

The previous prime is 201442121. The next prime is 201442183. The reversal of 201442143 is 341244102.

It is not a de Polignac number, because 201442143 - 2⁸ = 201441887 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201442103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34303 + ... + 39743.

It is an arithmetic number, because the mean of its divisors is an integer number (10056816).

Almost surely, 2^201442143 is an apocalyptic number.

201442143 is a deficient number, since it is larger than the sum of its proper divisors (120375969).

201442143 is a wasteful number, since it uses less digits than its factorization.

201442143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5535.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 201442143 is about 14193.0314943637. The cubic root of 201442143 is about 586.2057998479.

Adding to 201442143 its reverse (341244102), we get a palindrome (542686245).

The spelling of 201442143 in words is "two hundred one million, four hundred forty-two thousand, one hundred forty-three".