201155 has 4 divisors (see below), whose sum is σ = 241392. Its totient is φ = 160920.

The previous prime is 201151. The next prime is 201163. The reversal of 201155 is 551102.

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

It is not a de Polignac number, because 201155 - 2² = 201151 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201151) 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, 20111 + ... + 20120.

It is an arithmetic number, because the mean of its divisors is an integer number (60348).

2²⁰¹¹⁵⁵ is an apocalyptic number.

201155 is a deficient number, since it is larger than the sum of its proper divisors (40237).

201155 is an equidigital number, since it uses as much as digits as its factorization.

201155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40236.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 201155 is about 448.5030657643. The cubic root of 201155 is about 58.5927134335.

Adding to 201155 its reverse (551102), we get a palindrome (752257).

The spelling of 201155 in words is "two hundred one thousand, one hundred fifty-five".