543539881 has 2 divisors, whose sum is σ = 543539882. Its totient is φ = 543539880.

The previous prime is 543539873. The next prime is 543539891. The reversal of 543539881 is 188935345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 543309481 + 230400 = 23309^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 543539881 - 2³ = 543539873 is a prime.

It is a super-2 number, since 2×543539881² = 590871204474988322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (543539891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271769940 + 271769941.

It is an arithmetic number, because the mean of its divisors is an integer number (271769941).

Almost surely, 2^543539881 is an apocalyptic number.

It is an amenable number.

543539881 is a deficient number, since it is larger than the sum of its proper divisors (1).

543539881 is an equidigital number, since it uses as much as digits as its factorization.

543539881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 46.

The square root of 543539881 is about 23313.9417731108. The cubic root of 543539881 is about 816.1008026382.

The spelling of 543539881 in words is "five hundred forty-three million, five hundred thirty-nine thousand, eight hundred eighty-one".