2143231 has 2 divisors, whose sum is σ = 2143232. Its totient is φ = 2143230.

The previous prime is 2143223. The next prime is 2143243. The reversal of 2143231 is 1323412.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2143231 - 2³ = 2143223 is a prime.

It is a super-2 number, since 2×2143231² = 9186878238722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2143201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071615 + 1071616.

It is an arithmetic number, because the mean of its divisors is an integer number (1071616).

2^2143231 is an apocalyptic number.

2143231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2143231 is an equidigital number, since it uses as much as digits as its factorization.

2143231 is an evil number, because the sum of its binary digits is even.

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

The square root of 2143231 is about 1463.9778003781. The cubic root of 2143231 is about 128.9306961032.

Adding to 2143231 its reverse (1323412), we get a palindrome (3466643).

The spelling of 2143231 in words is "two million, one hundred forty-three thousand, two hundred thirty-one".