1115206163 has 4 divisors (see below), whose sum is σ = 1115352120. Its totient is φ = 1115060208.

The previous prime is 1115206151. The next prime is 1115206189. The reversal of 1115206163 is 3616025111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3616025111 = 39323 ⋅91957.

It is a cyclic number.

It is not a de Polignac number, because 1115206163 - 2²² = 1111011859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1115206063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60845 + ... + 77022.

It is an arithmetic number, because the mean of its divisors is an integer number (278838030).

Almost surely, 2^1115206163 is an apocalyptic number.

1115206163 is a deficient number, since it is larger than the sum of its proper divisors (145957).

1115206163 is an equidigital number, since it uses as much as digits as its factorization.

1115206163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145956.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 1115206163 is about 33394.7026188286. The cubic root of 1115206163 is about 1037.0150364810.

The spelling of 1115206163 in words is "one billion, one hundred fifteen million, two hundred six thousand, one hundred sixty-three".