115543261 has 2 divisors, whose sum is σ = 115543262. Its totient is φ = 115543260.

The previous prime is 115543229. The next prime is 115543303. The reversal of 115543261 is 162345511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76230361 + 39312900 = 8731^2 + 6270^2 .

It is a cyclic number.

It is not a de Polignac number, because 115543261 - 2⁵ = 115543229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (115543661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 57771630 + 57771631.

It is an arithmetic number, because the mean of its divisors is an integer number (57771631).

Almost surely, 2^115543261 is an apocalyptic number.

It is an amenable number.

115543261 is a deficient number, since it is larger than the sum of its proper divisors (1).

115543261 is an equidigital number, since it uses as much as digits as its factorization.

115543261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 28.

The square root of 115543261 is about 10749.1051255442. The cubic root of 115543261 is about 487.0589634682.

Adding to 115543261 its reverse (162345511), we get a palindrome (277888772).

The spelling of 115543261 in words is "one hundred fifteen million, five hundred forty-three thousand, two hundred sixty-one".