115543537 has 4 divisors (see below), whose sum is σ = 118230640. Its totient is φ = 112856436.

The previous prime is 115543529. The next prime is 115543601. The reversal of 115543537 is 735345511.

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: 735345511 = 37 ⋅19874203.

It is a cyclic number.

It is not a de Polignac number, because 115543537 - 2³ = 115543529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115543937) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1343487 + ... + 1343572.

It is an arithmetic number, because the mean of its divisors is an integer number (29557660).

Almost surely, 2^115543537 is an apocalyptic number.

It is an amenable number.

115543537 is a deficient number, since it is larger than the sum of its proper divisors (2687103).

115543537 is an equidigital number, since it uses as much as digits as its factorization.

115543537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2687102.

The product of its digits is 31500, while the sum is 34.

The square root of 115543537 is about 10749.1179638145. The cubic root of 115543537 is about 487.0593512830.

The spelling of 115543537 in words is "one hundred fifteen million, five hundred forty-three thousand, five hundred thirty-seven".