2521423543 has 4 divisors (see below), whose sum is σ = 2527115688. Its totient is φ = 2515731400.

The previous prime is 2521423501. The next prime is 2521423607. The reversal of 2521423543 is 3453241252.

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 2521423543 - 2⁹ = 2521423031 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 (2521423243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2845408 + ... + 2846293.

It is an arithmetic number, because the mean of its divisors is an integer number (631778922).

Almost surely, 2^2521423543 is an apocalyptic number.

2521423543 is a deficient number, since it is larger than the sum of its proper divisors (5692145).

2521423543 is an equidigital number, since it uses as much as digits as its factorization.

2521423543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5692144.

The product of its digits is 28800, while the sum is 31.

The square root of 2521423543 is about 50213.7784178805. The cubic root of 2521423543 is about 1361.0746161648.

Adding to 2521423543 its reverse (3453241252), we get a palindrome (5974664795).

The spelling of 2521423543 in words is "two billion, five hundred twenty-one million, four hundred twenty-three thousand, five hundred forty-three".