2231611 has 4 divisors (see below), whose sum is σ = 2234752. Its totient is φ = 2228472.

The previous prime is 2231609. The next prime is 2231617. The reversal of 2231611 is 1161322.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2231611 - 2¹ = 2231609 is a prime.

It is a super-3 number, since 3×2231611³ = 33340855177735656393, which contains 333 as substring.

It is a Duffinian number.

2231611 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2231617) 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, 61 + ... + 2113.

It is an arithmetic number, because the mean of its divisors is an integer number (558688).

2^2231611 is an apocalyptic number.

2231611 is a deficient number, since it is larger than the sum of its proper divisors (3141).

2231611 is a wasteful number, since it uses less digits than its factorization.

2231611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3140.

The product of its digits is 72, while the sum is 16.

The square root of 2231611 is about 1493.8577576195. The cubic root of 2231611 is about 130.6791089371.

Adding to 2231611 its reverse (1161322), we get a palindrome (3392933).

The spelling of 2231611 in words is "two million, two hundred thirty-one thousand, six hundred eleven".