115601555 has 4 divisors (see below), whose sum is σ = 138721872. Its totient is φ = 92481240.

The previous prime is 115601503. The next prime is 115601557. The reversal of 115601555 is 555106511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 555106511 = 113 ⋅4912447.

It is not a de Polignac number, because 115601555 - 2¹⁰ = 115600531 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115601557) 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, 11560151 + ... + 11560160.

It is an arithmetic number, because the mean of its divisors is an integer number (34680468).

Almost surely, 2^115601555 is an apocalyptic number.

115601555 is a deficient number, since it is larger than the sum of its proper divisors (23120317).

115601555 is an equidigital number, since it uses as much as digits as its factorization.

115601555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23120316.

The product of its (nonzero) digits is 3750, while the sum is 29.

The square root of 115601555 is about 10751.8163581787. The cubic root of 115601555 is about 487.1408601864.

The spelling of 115601555 in words is "one hundred fifteen million, six hundred one thousand, five hundred fifty-five".