201884581 has 2 divisors, whose sum is σ = 201884582. Its totient is φ = 201884580.

The previous prime is 201884569. The next prime is 201884587. The reversal of 201884581 is 185488102.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 134792100 + 67092481 = 11610^2 + 8191^2 .

It is a cyclic number.

It is not a de Polignac number, because 201884581 - 2⁵ = 201884549 is a prime.

It is a super-2 number, since 2×201884581² = 81514768091091122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 201884581.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201884587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100942290 + 100942291.

It is an arithmetic number, because the mean of its divisors is an integer number (100942291).

Almost surely, 2^201884581 is an apocalyptic number.

It is an amenable number.

201884581 is a deficient number, since it is larger than the sum of its proper divisors (1).

201884581 is an equidigital number, since it uses as much as digits as its factorization.

201884581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20480, while the sum is 37.

The square root of 201884581 is about 14208.6093971226. The cubic root of 201884581 is about 586.6346575956.

The spelling of 201884581 in words is "two hundred one million, eight hundred eighty-four thousand, five hundred eighty-one".