2543241021 has 8 divisors (see below), whose sum is σ = 3590457984. Its totient is φ = 1595759040.

The previous prime is 2543241013. The next prime is 2543241037. The reversal of 2543241021 is 1201423452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2543241021 - 2³ = 2543241013 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2543240982 and 2543241000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2543241061) 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 7 ways as a sum of consecutive naturals, for example, 24933685 + ... + 24933786.

It is an arithmetic number, because the mean of its divisors is an integer number (448807248).

Almost surely, 2^2543241021 is an apocalyptic number.

It is an amenable number.

2543241021 is a deficient number, since it is larger than the sum of its proper divisors (1047216963).

2543241021 is a wasteful number, since it uses less digits than its factorization.

2543241021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49867491.

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2543241021 is about 50430.5564216775. The cubic root of 2543241021 is about 1364.9890683288.

Adding to 2543241021 its reverse (1201423452), we get a palindrome (3744664473).

The spelling of 2543241021 in words is "two billion, five hundred forty-three million, two hundred forty-one thousand, twenty-one".