201000243 has 32 divisors (see below), whose sum is σ = 289884672. Its totient is φ = 123552000.

The previous prime is 201000229. The next prime is 201000257. The reversal of 201000243 is 342000102.

It is an interprime number because it is at equal distance from previous prime (201000229) and next prime (201000257).

It is not a de Polignac number, because 201000243 - 2⁵ = 201000211 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201000263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 334143 + ... + 334743.

It is an arithmetic number, because the mean of its divisors is an integer number (9058896).

Almost surely, 2^201000243 is an apocalyptic number.

201000243 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

201000243 is a deficient number, since it is larger than the sum of its proper divisors (88884429).

201000243 is a wasteful number, since it uses less digits than its factorization.

201000243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 201000243 is about 14177.4554487045. The cubic root of 201000243 is about 585.7768363242.

Adding to 201000243 its reverse (342000102), we get a palindrome (543000345).

The spelling of 201000243 in words is "two hundred one million, two hundred forty-three", and thus it is an aban number.