2142031231 has 4 divisors (see below), whose sum is σ = 2142131512. Its totient is φ = 2141930952.

The previous prime is 2142031217. The next prime is 2142031237. The reversal of 2142031231 is 1321302412.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2142031231 - 2²⁷ = 2007813503 is a prime.

It is a super-3 number, since 3×2142031231³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2142031199 and 2142031208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2142031237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3861 + ... + 65566.

It is an arithmetic number, because the mean of its divisors is an integer number (535532878).

Almost surely, 2^2142031231 is an apocalyptic number.

2142031231 is a deficient number, since it is larger than the sum of its proper divisors (100281).

2142031231 is an equidigital number, since it uses as much as digits as its factorization.

2142031231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100280.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 2142031231 is about 46282.0832612362. The cubic root of 2142031231 is about 1289.0663337958.

Adding to 2142031231 its reverse (1321302412), we get a palindrome (3463333643).

The spelling of 2142031231 in words is "two billion, one hundred forty-two million, thirty-one thousand, two hundred thirty-one".