423213545543 has 2 divisors, whose sum is σ = 423213545544. Its totient is φ = 423213545542.

The previous prime is 423213545539. The next prime is 423213545563. The reversal of 423213545543 is 345545312324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423213545543 - 2² = 423213545539 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 423213545543.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423213545533) 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 as a sum of consecutive naturals, namely, 211606772771 + 211606772772.

It is an arithmetic number, because the mean of its divisors is an integer number (211606772772).

Almost surely, 2^423213545543 is an apocalyptic number.

423213545543 is a deficient number, since it is larger than the sum of its proper divisors (1).

423213545543 is an equidigital number, since it uses as much as digits as its factorization.

423213545543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864000, while the sum is 41.

Adding to 423213545543 its reverse (345545312324), we get a palindrome (768758857867).

The spelling of 423213545543 in words is "four hundred twenty-three billion, two hundred thirteen million, five hundred forty-five thousand, five hundred forty-three".