115540239 has 8 divisors (see below), whose sum is σ = 156164272. Its totient is φ = 75971520.

The previous prime is 115540219. The next prime is 115540253. The reversal of 115540239 is 932045511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 115540239 - 2⁹ = 115539727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115540219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 263572 + ... + 264009.

It is an arithmetic number, because the mean of its divisors is an integer number (19520534).

Almost surely, 2^115540239 is an apocalyptic number.

115540239 is a deficient number, since it is larger than the sum of its proper divisors (40624033).

115540239 is an equidigital number, since it uses as much as digits as its factorization.

115540239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 527657.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 115540239 is about 10748.9645547839. The cubic root of 115540239 is about 487.0547171365.

The spelling of 115540239 in words is "one hundred fifteen million, five hundred forty thousand, two hundred thirty-nine".