2531543 has 4 divisors (see below), whose sum is σ = 2893200. Its totient is φ = 2169888.

The previous prime is 2531537. The next prime is 2531549. The reversal of 2531543 is 3451352.

2531543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an interprime number because it is at equal distance from previous prime (2531537) and next prime (2531549).

It is not a de Polignac number, because 2531543 - 2⁴ = 2531527 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180818 + ... + 180831.

It is an arithmetic number, because the mean of its divisors is an integer number (723300).

2^2531543 is an apocalyptic number.

2531543 is a deficient number, since it is larger than the sum of its proper divisors (361657).

2531543 is an equidigital number, since it uses as much as digits as its factorization.

2531543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361656.

The product of its digits is 1800, while the sum is 23.

The square root of 2531543 is about 1591.0823360216. The cubic root of 2531543 is about 136.2893026925.

Adding to 2531543 its reverse (3451352), we get a palindrome (5982895).

The spelling of 2531543 in words is "two million, five hundred thirty-one thousand, five hundred forty-three".