2011161 has 8 divisors (see below), whose sum is σ = 2692800. Its totient is φ = 1335152.

The previous prime is 2011147. The next prime is 2011171. The reversal of 2011161 is 1611102.

It is a happy number.

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 2011161 - 2⁵ = 2011129 is a prime.

It is a Curzon number.

2011161 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2011111) 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, 486 + ... + 2063.

It is an arithmetic number, because the mean of its divisors is an integer number (336600).

2^2011161 is an apocalyptic number.

It is an amenable number.

2011161 is a deficient number, since it is larger than the sum of its proper divisors (681639).

2011161 is a wasteful number, since it uses less digits than its factorization.

2011161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2815.

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

The square root of 2011161 is about 1418.1540818966. The cubic root of 2011161 is about 126.2260366896.

Adding to 2011161 its reverse (1611102), we get a palindrome (3622263).

The spelling of 2011161 in words is "two million, eleven thousand, one hundred sixty-one".