221468543 has 2 divisors, whose sum is σ = 221468544. Its totient is φ = 221468542.

The previous prime is 221468519. The next prime is 221468551. The reversal of 221468543 is 345864122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221468543 - 2²⁰ = 220419967 is a prime.

It is a super-3 number, since 3×221468543³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221468573) 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, 110734271 + 110734272.

It is an arithmetic number, because the mean of its divisors is an integer number (110734272).

Almost surely, 2^221468543 is an apocalyptic number.

221468543 is a deficient number, since it is larger than the sum of its proper divisors (1).

221468543 is an equidigital number, since it uses as much as digits as its factorization.

221468543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 35.

The square root of 221468543 is about 14881.8192100294. The cubic root of 221468543 is about 605.0213256604.

The spelling of 221468543 in words is "two hundred twenty-one million, four hundred sixty-eight thousand, five hundred forty-three".