2531143 has 4 divisors (see below), whose sum is σ = 2535048. Its totient is φ = 2527240.

The previous prime is 2531117. The next prime is 2531167. The reversal of 2531143 is 3411352.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2531143 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2531143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 721 + ... + 2362.

It is an arithmetic number, because the mean of its divisors is an integer number (633762).

2^2531143 is an apocalyptic number.

2531143 is a deficient number, since it is larger than the sum of its proper divisors (3905).

2531143 is an equidigital number, since it uses as much as digits as its factorization.

2531143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3904.

The product of its digits is 360, while the sum is 19.

The square root of 2531143 is about 1590.9566304585. The cubic root of 2531143 is about 136.2821241203.

Adding to 2531143 its reverse (3411352), we get a palindrome (5942495).

The spelling of 2531143 in words is "two million, five hundred thirty-one thousand, one hundred forty-three".