543421111 has 4 divisors (see below), whose sum is σ = 562159800. Its totient is φ = 524682424.

The previous prime is 543421079. The next prime is 543421141. The reversal of 543421111 is 111124345.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 543421111 - 2⁵ = 543421079 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543421141) 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, 9369301 + ... + 9369358.

It is an arithmetic number, because the mean of its divisors is an integer number (140539950).

Almost surely, 2^543421111 is an apocalyptic number.

543421111 is a deficient number, since it is larger than the sum of its proper divisors (18738689).

543421111 is a wasteful number, since it uses less digits than its factorization.

543421111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18738688.

The product of its digits is 480, while the sum is 22.

The square root of 543421111 is about 23311.3944456354. The cubic root of 543421111 is about 816.0413556951.

Adding to 543421111 its reverse (111124345), we get a palindrome (654545456).

The spelling of 543421111 in words is "five hundred forty-three million, four hundred twenty-one thousand, one hundred eleven".