201020243 has 4 divisors (see below), whose sum is σ = 201210768. Its totient is φ = 200829720.

The previous prime is 201020233. The next prime is 201020249. The reversal of 201020243 is 342020102.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201020243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201020249) 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, 93671 + ... + 95792.

It is an arithmetic number, because the mean of its divisors is an integer number (50302692).

Almost surely, 2^201020243 is an apocalyptic number.

201020243 is a deficient number, since it is larger than the sum of its proper divisors (190525).

201020243 is a wasteful number, since it uses less digits than its factorization.

201020243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190524.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 201020243 is about 14178.1607763490. The cubic root of 201020243 is about 585.7962644071.

Adding to 201020243 its reverse (342020102), we get a palindrome (543040345).

The spelling of 201020243 in words is "two hundred one million, twenty thousand, two hundred forty-three".