201685111 has 8 divisors (see below), whose sum is σ = 210236400. Its totient is φ = 193240320.

The previous prime is 201685073. The next prime is 201685117. The reversal of 201685111 is 111586102.

It is a happy number.

201685111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201685111 - 2⁹ = 201684599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201685117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22746 + ... + 30343.

It is an arithmetic number, because the mean of its divisors is an integer number (26279550).

Almost surely, 2^201685111 is an apocalyptic number.

201685111 is a deficient number, since it is larger than the sum of its proper divisors (8551289).

201685111 is a wasteful number, since it uses less digits than its factorization.

201685111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53249.

The product of its (nonzero) digits is 480, while the sum is 25.

The square root of 201685111 is about 14201.5883266626. The cubic root of 201685111 is about 586.4413877999.

Subtracting from 201685111 its reverse (111586102), we obtain a palindrome (90099009).

The spelling of 201685111 in words is "two hundred one million, six hundred eighty-five thousand, one hundred eleven".