2540142543 has 4 divisors (see below), whose sum is σ = 3386856728. Its totient is φ = 1693428360.

The previous prime is 2540142523. The next prime is 2540142551. The reversal of 2540142543 is 3452410452.

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

It is not a de Polignac number, because 2540142543 - 2²⁶ = 2473033679 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 2540142543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2540142523) 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, 423357088 + ... + 423357093.

It is an arithmetic number, because the mean of its divisors is an integer number (846714182).

Almost surely, 2^2540142543 is an apocalyptic number.

2540142543 is a deficient number, since it is larger than the sum of its proper divisors (846714185).

2540142543 is an equidigital number, since it uses as much as digits as its factorization.

2540142543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 846714184.

The product of its (nonzero) digits is 19200, while the sum is 30.

The square root of 2540142543 is about 50399.8268151786. The cubic root of 2540142543 is about 1364.4345125070.

Adding to 2540142543 its reverse (3452410452), we get a palindrome (5992552995).

The spelling of 2540142543 in words is "two billion, five hundred forty million, one hundred forty-two thousand, five hundred forty-three".