41543000021 has 4 divisors (see below), whose sum is σ = 41775084000. Its totient is φ = 41310916044.

The previous prime is 41543000003. The next prime is 41543000077. The reversal of 41543000021 is 12000034514.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 41543000021 - 2⁶ = 41542999957 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 41542999957 and 41543000002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41543000621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116041721 + ... + 116042078.

It is an arithmetic number, because the mean of its divisors is an integer number (10443771000).

Almost surely, 2^41543000021 is an apocalyptic number.

It is an amenable number.

41543000021 is a deficient number, since it is larger than the sum of its proper divisors (232083979).

41543000021 is a wasteful number, since it uses less digits than its factorization.

41543000021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232083978.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 41543000021 its sum of digits (20), we get a square (41543000041 = 203821²).

Adding to 41543000021 its reverse (12000034514), we get a palindrome (53543034535).

The spelling of 41543000021 in words is "forty-one billion, five hundred forty-three million, twenty-one", and thus it is an aban number.