115532561 has 16 divisors (see below), whose sum is σ = 125193600. Its totient is φ = 106215168.

The previous prime is 115532513. The next prime is 115532569. The reversal of 115532561 is 165235511.

It is a cyclic number.

It is not a de Polignac number, because 115532561 - 2⁶ = 115532497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (115532569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 229436 + ... + 229938.

It is an arithmetic number, because the mean of its divisors is an integer number (7824600).

Almost surely, 2^115532561 is an apocalyptic number.

It is an amenable number.

115532561 is a deficient number, since it is larger than the sum of its proper divisors (9661039).

115532561 is a wasteful number, since it uses less digits than its factorization.

115532561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 808.

The product of its digits is 4500, while the sum is 29.

The square root of 115532561 is about 10748.6073981702. The cubic root of 115532561 is about 487.0439281422.

The spelling of 115532561 in words is "one hundred fifteen million, five hundred thirty-two thousand, five hundred sixty-one".