201105231 has 4 divisors (see below), whose sum is σ = 268140312. Its totient is φ = 134070152.

The previous prime is 201105211. The next prime is 201105239. The reversal of 201105231 is 132501102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 201105231 - 2⁵ = 201105199 is a prime.

It is a super-2 number, since 2×201105231² = 80886627871126722, 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 201105231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201105239) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33517536 + ... + 33517541.

It is an arithmetic number, because the mean of its divisors is an integer number (67035078).

Almost surely, 2^201105231 is an apocalyptic number.

201105231 is a deficient number, since it is larger than the sum of its proper divisors (67035081).

201105231 is an equidigital number, since it uses as much as digits as its factorization.

201105231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67035080.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 201105231 is about 14181.1576043707. The cubic root of 201105231 is about 585.8788077332.

Adding to 201105231 its reverse (132501102), we get a palindrome (333606333).

The spelling of 201105231 in words is "two hundred one million, one hundred five thousand, two hundred thirty-one".