201813201 has 24 divisors (see below), whose sum is σ = 315456960. Its totient is φ = 128688912.

The previous prime is 201813167. The next prime is 201813203. The reversal of 201813201 is 102318102.

It is not a de Polignac number, because 201813201 - 2¹¹ = 201811153 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (201813203) 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 23 ways as a sum of consecutive naturals, for example, 12466 + ... + 23643.

It is an arithmetic number, because the mean of its divisors is an integer number (13144040).

Almost surely, 2^201813201 is an apocalyptic number.

It is an amenable number.

201813201 is a deficient number, since it is larger than the sum of its proper divisors (113643759).

201813201 is an equidigital number, since it uses as much as digits as its factorization.

201813201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36147 (or 36135 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 201813201 is about 14206.0973177013. The cubic root of 201813201 is about 586.5655109612.

The spelling of 201813201 in words is "two hundred one million, eight hundred thirteen thousand, two hundred one".