2231143 has 4 divisors (see below), whose sum is σ = 2239648. Its totient is φ = 2222640.

The previous prime is 2231129. The next prime is 2231149. The reversal of 2231143 is 3411322.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 2231143 - 2¹⁷ = 2100071 is a prime.

It is a super-3 number, since 3×2231143³ = 33319883447211243621, which contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2231149) 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, 3846 + ... + 4387.

It is an arithmetic number, because the mean of its divisors is an integer number (559912).

2^2231143 is an apocalyptic number.

2231143 is a deficient number, since it is larger than the sum of its proper divisors (8505).

2231143 is an equidigital number, since it uses as much as digits as its factorization.

2231143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8504.

The product of its digits is 144, while the sum is 16.

The square root of 2231143 is about 1493.7011079865. The cubic root of 2231143 is about 130.6699732203.

Adding to 2231143 its reverse (3411322), we get a palindrome (5642465).

The spelling of 2231143 in words is "two million, two hundred thirty-one thousand, one hundred forty-three".