2143142431 has 4 divisors (see below), whose sum is σ = 2154363264. Its totient is φ = 2131921600.

The previous prime is 2143142423. The next prime is 2143142471. The reversal of 2143142431 is 1342413412.

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 2143142431 - 2³ = 2143142423 is a prime.

It is a super-2 number, since 2×2143142431² = 9186118959105179522, 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 = 2143142396 and 2143142405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2143142471) 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, 5610130 + ... + 5610511.

It is an arithmetic number, because the mean of its divisors is an integer number (538590816).

Almost surely, 2^2143142431 is an apocalyptic number.

2143142431 is a deficient number, since it is larger than the sum of its proper divisors (11220833).

2143142431 is a wasteful number, since it uses less digits than its factorization.

2143142431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11220832.

The product of its digits is 2304, while the sum is 25.

The square root of 2143142431 is about 46294.0863502024. The cubic root of 2143142431 is about 1289.2892005882.

Adding to 2143142431 its reverse (1342413412), we get a palindrome (3485555843).

The spelling of 2143142431 in words is "two billion, one hundred forty-three million, one hundred forty-two thousand, four hundred thirty-one".