115538218271 has 4 divisors (see below), whose sum is σ = 132043678032. Its totient is φ = 99032758512.

The previous prime is 115538218231. The next prime is 115538218309. The reversal of 115538218271 is 172812835511.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 115538218271 - 2¹⁰ = 115538217247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115538218231) 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, 8252729870 + ... + 8252729883.

It is an arithmetic number, because the mean of its divisors is an integer number (33010919508).

Almost surely, 2^115538218271 is an apocalyptic number.

115538218271 is a deficient number, since it is larger than the sum of its proper divisors (16505459761).

115538218271 is an equidigital number, since it uses as much as digits as its factorization.

115538218271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16505459760.

The product of its digits is 134400, while the sum is 44.

The spelling of 115538218271 in words is "one hundred fifteen billion, five hundred thirty-eight million, two hundred eighteen thousand, two hundred seventy-one".