543261881 has 2 divisors, whose sum is σ = 543261882. Its totient is φ = 543261880.

The previous prime is 543261869. The next prime is 543261899. The reversal of 543261881 is 188162345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 520068025 + 23193856 = 22805^2 + 4816^2 .

It is a cyclic number.

It is not a de Polignac number, because 543261881 - 2²² = 539067577 is a prime.

It is a super-2 number, since 2×543261881² = 590266942695316322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (543261811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271630940 + 271630941.

It is an arithmetic number, because the mean of its divisors is an integer number (271630941).

Almost surely, 2^543261881 is an apocalyptic number.

It is an amenable number.

543261881 is a deficient number, since it is larger than the sum of its proper divisors (1).

543261881 is an equidigital number, since it uses as much as digits as its factorization.

543261881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 38.

The square root of 543261881 is about 23307.9789128101. The cubic root of 543261881 is about 815.9616440585.

The spelling of 543261881 in words is "five hundred forty-three million, two hundred sixty-one thousand, eight hundred eighty-one".