6450221543 has 2 divisors, whose sum is σ = 6450221544. Its totient is φ = 6450221542.

The previous prime is 6450221539. The next prime is 6450221563. The reversal of 6450221543 is 3451220546.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6450221543 - 2² = 6450221539 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6450221563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3225110771 + 3225110772.

It is an arithmetic number, because the mean of its divisors is an integer number (3225110772).

Almost surely, 2^6450221543 is an apocalyptic number.

6450221543 is a deficient number, since it is larger than the sum of its proper divisors (1).

6450221543 is an equidigital number, since it uses as much as digits as its factorization.

6450221543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 6450221543 is about 80313.2712756740. The cubic root of 6450221543 is about 1861.4792971189.

The spelling of 6450221543 in words is "six billion, four hundred fifty million, two hundred twenty-one thousand, five hundred forty-three".