543136681 has 2 divisors, whose sum is σ = 543136682. Its totient is φ = 543136680.

The previous prime is 543136673. The next prime is 543136813. The reversal of 543136681 is 186631345.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 506655081 + 36481600 = 22509^2 + 6040^2 .

It is a cyclic number.

It is not a de Polignac number, because 543136681 - 2³ = 543136673 is a prime.

It is a super-2 number, since 2×543136681² = 589994908495391522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 543136681.

It is not a weakly prime, because it can be changed into another prime (543136631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271568340 + 271568341.

It is an arithmetic number, because the mean of its divisors is an integer number (271568341).

Almost surely, 2^543136681 is an apocalyptic number.

It is an amenable number.

543136681 is a deficient number, since it is larger than the sum of its proper divisors (1).

543136681 is an equidigital number, since it uses as much as digits as its factorization.

543136681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 543136681 is about 23305.2929824965. The cubic root of 543136681 is about 815.8989571358.

The spelling of 543136681 in words is "five hundred forty-three million, one hundred thirty-six thousand, six hundred eighty-one".