1115163161 has 16 divisors (see below), whose sum is σ = 1380829824. Its totient is φ = 878701824.

The previous prime is 1115163121. The next prime is 1115163167. The reversal of 1115163161 is 1613615111.

It is not a de Polignac number, because 1115163161 - 2¹⁸ = 1114901017 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 1115163161.

It is not an unprimeable number, because it can be changed into a prime (1115163167) by changing a digit.

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, 103850 + ... + 114083.

It is an arithmetic number, because the mean of its divisors is an integer number (86301864).

Almost surely, 2^1115163161 is an apocalyptic number.

It is an amenable number.

1115163161 is a deficient number, since it is larger than the sum of its proper divisors (265666663).

1115163161 is a wasteful number, since it uses less digits than its factorization.

1115163161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218000.

The product of its digits is 540, while the sum is 26.

The square root of 1115163161 is about 33394.0587679905. The cubic root of 1115163161 is about 1037.0017073181.

Adding to 1115163161 its reverse (1613615111), we get a palindrome (2728778272).

The spelling of 1115163161 in words is "one billion, one hundred fifteen million, one hundred sixty-three thousand, one hundred sixty-one".