201000081 has 16 divisors (see below), whose sum is σ = 275421888. Its totient is φ = 130310400.

The previous prime is 201000053. The next prime is 201000083. The reversal of 201000081 is 180000102.

It is a happy number.

201000081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201000081 - 2⁵ = 201000049 is a prime.

It is a super-2 number, since 2×201000081² = 80802065124013122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (201000083) 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, 38245 + ... + 43181.

It is an arithmetic number, because the mean of its divisors is an integer number (17213868).

Almost surely, 2^201000081 is an apocalyptic number.

It is an amenable number.

201000081 is a deficient number, since it is larger than the sum of its proper divisors (74421807).

201000081 is a wasteful number, since it uses less digits than its factorization.

201000081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5312.

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 201000081 is about 14177.4497354073. The cubic root of 201000081 is about 585.7766789515.

Adding to 201000081 its reverse (180000102), we get a palindrome (381000183).

The spelling of 201000081 in words is "two hundred one million, eighty-one", and thus it is an aban number.