2143340231 has 16 divisors (see below), whose sum is σ = 2230986240. Its totient is φ = 2057565120.

The previous prime is 2143340191. The next prime is 2143340257. The reversal of 2143340231 is 1320433412.

It is a cyclic number.

It is not a de Polignac number, because 2143340231 - 2¹⁸ = 2143078087 is a prime.

It is a super-2 number, since 2×2143340231² = 9187814691646266722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2143340197 and 2143340206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143340131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1122980 + ... + 1124886.

It is an arithmetic number, because the mean of its divisors is an integer number (139436640).

Almost surely, 2^2143340231 is an apocalyptic number.

2143340231 is a deficient number, since it is larger than the sum of its proper divisors (87646009).

2143340231 is a wasteful number, since it uses less digits than its factorization.

2143340231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374.

The product of its (nonzero) digits is 1728, while the sum is 23.

The square root of 2143340231 is about 46296.2226428896. Note that the first 3 decimals coincide. The cubic root of 2143340231 is about 1289.3288640834.

Adding to 2143340231 its reverse (1320433412), we get a palindrome (3463773643).

The spelling of 2143340231 in words is "two billion, one hundred forty-three million, three hundred forty thousand, two hundred thirty-one".