115190881 has 4 divisors (see below), whose sum is σ = 124051732. Its totient is φ = 106330032.

The previous prime is 115190869. The next prime is 115190891. The reversal of 115190881 is 188091511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 188091511 = 9311 ⋅20201.

It can be written as a sum of positive squares in 2 ways, for example, as 28998225 + 86192656 = 5385^2 + 9284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-115190881 is a prime.

It is a super-2 number, since 2×115190881² = 26537878131112322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (115190821) 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, 4430406 + ... + 4430431.

It is an arithmetic number, because the mean of its divisors is an integer number (31012933).

Almost surely, 2^115190881 is an apocalyptic number.

It is an amenable number.

115190881 is a deficient number, since it is larger than the sum of its proper divisors (8860851).

115190881 is an equidigital number, since it uses as much as digits as its factorization.

115190881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8860850.

The product of its (nonzero) digits is 2880, while the sum is 34.

The square root of 115190881 is about 10732.7014772610. The cubic root of 115190881 is about 486.5633205108.

The spelling of 115190881 in words is "one hundred fifteen million, one hundred ninety thousand, eight hundred eighty-one".