201540334843 has 4 divisors (see below), whose sum is σ = 206455952808. Its totient is φ = 196624716880.

The previous prime is 201540334823. The next prime is 201540334927. The reversal of 201540334843 is 348433045102.

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 201540334843 - 2²⁹ = 201003463931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201540334823) 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, 2457808921 + ... + 2457809002.

It is an arithmetic number, because the mean of its divisors is an integer number (51613988202).

Almost surely, 2^201540334843 is an apocalyptic number.

201540334843 is a deficient number, since it is larger than the sum of its proper divisors (4915617965).

201540334843 is an equidigital number, since it uses as much as digits as its factorization.

201540334843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4915617964.

The product of its (nonzero) digits is 138240, while the sum is 37.

Adding to 201540334843 its reverse (348433045102), we get a palindrome (549973379945).

The spelling of 201540334843 in words is "two hundred one billion, five hundred forty million, three hundred thirty-four thousand, eight hundred forty-three".