115156291 has 4 divisors (see below), whose sum is σ = 115336584. Its totient is φ = 114976000.

The previous prime is 115156277. The next prime is 115156313. The reversal of 115156291 is 192651511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 192651511 = 13 ⋅14819347.

It is a cyclic number.

It is not a de Polignac number, because 115156291 - 2¹⁵ = 115123523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115156241) 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, 89185 + ... + 90466.

It is an arithmetic number, because the mean of its divisors is an integer number (28834146).

Almost surely, 2^115156291 is an apocalyptic number.

115156291 is a deficient number, since it is larger than the sum of its proper divisors (180293).

115156291 is an equidigital number, since it uses as much as digits as its factorization.

115156291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180292.

The product of its digits is 2700, while the sum is 31.

The square root of 115156291 is about 10731.0899260047. The cubic root of 115156291 is about 486.5146132115.

The spelling of 115156291 in words is "one hundred fifteen million, one hundred fifty-six thousand, two hundred ninety-one".