1115163205 has 16 divisors (see below), whose sum is σ = 1445706864. Its totient is φ = 820892160.

The previous prime is 1115163199. The next prime is 1115163227. The reversal of 1115163205 is 5023615111.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 715723009 + 399440196 = 26753^2 + 19986^2 .

It is not a de Polignac number, because 1115163205 - 2⁵ = 1115163173 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1115163205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6456 + ... + 47665.

It is an arithmetic number, because the mean of its divisors is an integer number (90356679).

Almost surely, 2^1115163205 is an apocalyptic number.

It is an amenable number.

1115163205 is a deficient number, since it is larger than the sum of its proper divisors (330543659).

1115163205 is a wasteful number, since it uses less digits than its factorization.

1115163205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54456.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 1115163205 is about 33394.0594267903. The cubic root of 1115163205 is about 1037.0017209568.

Adding to 1115163205 its reverse (5023615111), we get a palindrome (6138778316).

The spelling of 1115163205 in words is "one billion, one hundred fifteen million, one hundred sixty-three thousand, two hundred five".