201811342 has 4 divisors (see below), whose sum is σ = 302717016. Its totient is φ = 100905670.

The previous prime is 201811297. The next prime is 201811343. The reversal of 201811342 is 243118102.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201811343) 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 as a sum of consecutive naturals, namely, 50452834 + ... + 50452837.

It is an arithmetic number, because the mean of its divisors is an integer number (75679254).

Almost surely, 2^201811342 is an apocalyptic number.

201811342 is a deficient number, since it is larger than the sum of its proper divisors (100905674).

201811342 is a wasteful number, since it uses less digits than its factorization.

201811342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100905673.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 201811342 is about 14206.0318878989. The cubic root of 201811342 is about 586.5637099085.

Adding to 201811342 its reverse (243118102), we get a palindrome (444929444).

The spelling of 201811342 in words is "two hundred one million, eight hundred eleven thousand, three hundred forty-two".