201819201 has 16 divisors (see below), whose sum is σ = 278218368. Its totient is φ = 130032000.

The previous prime is 201819199. The next prime is 201819203. The reversal of 201819201 is 102918102.

It is an interprime number because it is at equal distance from previous prime (201819199) and next prime (201819203).

It is not a de Polignac number, because 201819201 - 2¹ = 201819199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (201819203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10741 + ... + 22781.

It is an arithmetic number, because the mean of its divisors is an integer number (17388648).

Almost surely, 2^201819201 is an apocalyptic number.

It is an amenable number.

201819201 is a deficient number, since it is larger than the sum of its proper divisors (76399167).

201819201 is a wasteful number, since it uses less digits than its factorization.

201819201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12232.

The product of its (nonzero) digits is 288, while the sum is 24.

The square root of 201819201 is about 14206.3084930604. The cubic root of 201819201 is about 586.5713238584.

The spelling of 201819201 in words is "two hundred one million, eight hundred nineteen thousand, two hundred one".