201640111 has 8 divisors (see below), whose sum is σ = 217121040. Its totient is φ = 186561408.

The previous prime is 201640079. The next prime is 201640123. The reversal of 201640111 is 111046102.

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 201640111 - 2⁵ = 201640079 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 (201640171) 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, 99516 + ... + 101521.

It is an arithmetic number, because the mean of its divisors is an integer number (27140130).

Almost surely, 2^201640111 is an apocalyptic number.

201640111 is a deficient number, since it is larger than the sum of its proper divisors (15480929).

201640111 is a wasteful number, since it uses less digits than its factorization.

201640111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201113.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 201640111 is about 14200.0039084502. The cubic root of 201640111 is about 586.3977689374.

Adding to 201640111 its reverse (111046102), we get a palindrome (312686213).

The spelling of 201640111 in words is "two hundred one million, six hundred forty thousand, one hundred eleven".