21552543343 has 2 divisors, whose sum is σ = 21552543344. Its totient is φ = 21552543342.

The previous prime is 21552543329. The next prime is 21552543347. The reversal of 21552543343 is 34334525512.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21552543343 - 2³³ = 12962608751 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21552543347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10776271671 + 10776271672.

It is an arithmetic number, because the mean of its divisors is an integer number (10776271672).

Almost surely, 2^21552543343 is an apocalyptic number.

21552543343 is a deficient number, since it is larger than the sum of its proper divisors (1).

21552543343 is an equidigital number, since it uses as much as digits as its factorization.

21552543343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 37.

The spelling of 21552543343 in words is "twenty-one billion, five hundred fifty-two million, five hundred forty-three thousand, three hundred forty-three".