543499261 has 2 divisors, whose sum is σ = 543499262. Its totient is φ = 543499260.

The previous prime is 543499247. The next prime is 543499279. The reversal of 543499261 is 162994345.

543499261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 381420900 + 162078361 = 19530^2 + 12731^2 .

It is a cyclic number.

It is not a de Polignac number, because 543499261 - 2⁷ = 543499133 is a prime.

It is a super-2 number, since 2×543499261² = 590782893415092242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (543499291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271749630 + 271749631.

It is an arithmetic number, because the mean of its divisors is an integer number (271749631).

Almost surely, 2^543499261 is an apocalyptic number.

It is an amenable number.

543499261 is a deficient number, since it is larger than the sum of its proper divisors (1).

543499261 is an equidigital number, since it uses as much as digits as its factorization.

543499261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 43.

The square root of 543499261 is about 23313.0706042769. The cubic root of 543499261 is about 816.0804724278.

The spelling of 543499261 in words is "five hundred forty-three million, four hundred ninety-nine thousand, two hundred sixty-one".