2143111431 has 8 divisors (see below), whose sum is σ = 2857699440. Its totient is φ = 1428632192.

The previous prime is 2143111393. The next prime is 2143111463. The reversal of 2143111431 is 1341113412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2143111431 - 2¹¹ = 2143109383 is a prime.

It is a super-2 number, since 2×2143111431² = 9185853211365735522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2143111398 and 2143111407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143111471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50485 + ... + 82673.

It is an arithmetic number, because the mean of its divisors is an integer number (357212430).

Almost surely, 2^2143111431 is an apocalyptic number.

2143111431 is a deficient number, since it is larger than the sum of its proper divisors (714588009).

2143111431 is a wasteful number, since it uses less digits than its factorization.

2143111431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54385.

The product of its digits is 288, while the sum is 21.

The square root of 2143111431 is about 46293.7515330093. The cubic root of 2143111431 is about 1289.2829841468.

Adding to 2143111431 its reverse (1341113412), we get a palindrome (3484224843).

The spelling of 2143111431 in words is "two billion, one hundred forty-three million, one hundred eleven thousand, four hundred thirty-one".