543636881 has 2 divisors, whose sum is σ = 543636882. Its totient is φ = 543636880.

The previous prime is 543636853. The next prime is 543636943. The reversal of 543636881 is 188636345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 502163281 + 41473600 = 22409^2 + 6440^2 .

It is a cyclic number.

It is not a de Polignac number, because 543636881 - 2²² = 539442577 is a prime.

It is a super-2 number, since 2×543636881² = 591082116766816322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (543636811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271818440 + 271818441.

It is an arithmetic number, because the mean of its divisors is an integer number (271818441).

Almost surely, 2^543636881 is an apocalyptic number.

It is an amenable number.

543636881 is a deficient number, since it is larger than the sum of its proper divisors (1).

543636881 is an equidigital number, since it uses as much as digits as its factorization.

543636881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 414720, while the sum is 44.

The square root of 543636881 is about 23316.0219806038. The cubic root of 543636881 is about 816.1493468034.

The spelling of 543636881 in words is "five hundred forty-three million, six hundred thirty-six thousand, eight hundred eighty-one".