1115163565 has 4 divisors (see below), whose sum is σ = 1338196284. Its totient is φ = 892130848.

The previous prime is 1115163557. The next prime is 1115163583. The reversal of 1115163565 is 5653615111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 789216649 + 325946916 = 28093^2 + 18054^2 .

It is a cyclic number.

It is not a de Polignac number, because 1115163565 - 2³ = 1115163557 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 1115163565.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111516352 + ... + 111516361.

It is an arithmetic number, because the mean of its divisors is an integer number (334549071).

Almost surely, 2^1115163565 is an apocalyptic number.

It is an amenable number.

1115163565 is a deficient number, since it is larger than the sum of its proper divisors (223032719).

1115163565 is an equidigital number, since it uses as much as digits as its factorization.

1115163565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223032718.

The product of its digits is 13500, while the sum is 34.

The square root of 1115163565 is about 33394.0648169701. The cubic root of 1115163565 is about 1037.0018325460.

Adding to 1115163565 its reverse (5653615111), we get a palindrome (6768778676).

The spelling of 1115163565 in words is "one billion, one hundred fifteen million, one hundred sixty-three thousand, five hundred sixty-five".