115544521 has 4 divisors (see below), whose sum is σ = 115595392. Its totient is φ = 115493652.

The previous prime is 115544503. The next prime is 115544591. The reversal of 115544521 is 125445511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 125445511 = 6343 ⋅19777.

It is a cyclic number.

It is not a de Polignac number, because 115544521 - 2¹⁷ = 115413449 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 115544521.

It is not an unprimeable number, because it can be changed into a prime (115544591) 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 3 ways as a sum of consecutive naturals, for example, 21861 + ... + 26626.

It is an arithmetic number, because the mean of its divisors is an integer number (28898848).

Almost surely, 2^115544521 is an apocalyptic number.

It is an amenable number.

115544521 is a deficient number, since it is larger than the sum of its proper divisors (50871).

115544521 is an equidigital number, since it uses as much as digits as its factorization.

115544521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50870.

The product of its digits is 4000, while the sum is 28.

The square root of 115544521 is about 10749.1637349145. The cubic root of 115544521 is about 487.0607339221.

The spelling of 115544521 in words is "one hundred fifteen million, five hundred forty-four thousand, five hundred twenty-one".