2231868 has 24 divisors (see below), whose sum is σ = 5294800. Its totient is φ = 731520.

The previous prime is 2231861. The next prime is 2231881. The reversal of 2231868 is 8681322.

2231868 is nontrivially palindromic in base 11.

It is a super-3 number, since 3×2231868³ = 33352375447094412096, which contains 333 as substring.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231861) 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, 793 + ... + 2256.

2^2231868 is an apocalyptic number.

It is an amenable number.

2231868 is an abundant number, since it is smaller than the sum of its proper divisors (3062932).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2231868 is a wasteful number, since it uses less digits than its factorization.

2231868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3117 (or 3115 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 2231868 is about 1493.9437740424. The cubic root of 2231868 is about 130.6841252298.

The spelling of 2231868 in words is "two million, two hundred thirty-one thousand, eight hundred sixty-eight".