2161233 has 12 divisors (see below), whose sum is σ = 3198468. Its totient is φ = 1405440.

The previous prime is 2161213. The next prime is 2161253. The reversal of 2161233 is 3321612.

2161233 is a `hidden beast` number, since 21 + 612 + 33 = 666.

It is an interprime number because it is at equal distance from previous prime (2161213) and next prime (2161253).

It can be written as a sum of positive squares in 2 ways, for example, as 1065024 + 1096209 = 1032^2 + 1047^2 .

It is not a de Polignac number, because 2161233 - 2⁹ = 2160721 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2161213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2560 + ... + 3297.

It is an arithmetic number, because the mean of its divisors is an integer number (266539).

2^2161233 is an apocalyptic number.

It is an amenable number.

2161233 is a deficient number, since it is larger than the sum of its proper divisors (1037235).

2161233 is a wasteful number, since it uses less digits than its factorization.

2161233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5904 (or 5901 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2161233 is about 1470.1132609428. The cubic root of 2161233 is about 129.2906731859.

Adding to 2161233 its reverse (3321612), we get a palindrome (5482845).

The spelling of 2161233 in words is "two million, one hundred sixty-one thousand, two hundred thirty-three".