1155055113 has 8 divisors (see below), whose sum is σ = 1711192800. Its totient is φ = 770036724.

The previous prime is 1155055093. The next prime is 1155055171. The reversal of 1155055113 is 3115505511.

It is not a de Polignac number, because 1155055113 - 2²⁰ = 1154006537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 42779819 = 1155055113 / (1 + 1 + 5 + 5 + 0 + 5 + 5 + 1 + 1 + 3).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1155055513) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21389883 + ... + 21389936.

It is an arithmetic number, because the mean of its divisors is an integer number (213899100).

Almost surely, 2^1155055113 is an apocalyptic number.

It is an amenable number.

1155055113 is a deficient number, since it is larger than the sum of its proper divisors (556137687).

1155055113 is an equidigital number, since it uses as much as digits as its factorization.

1155055113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42779828 (or 42779822 counting only the distinct ones).

The product of its (nonzero) digits is 1875, while the sum is 27.

The square root of 1155055113 is about 33986.1017623381. The cubic root of 1155055113 is about 1049.2224365729. Note that the first 3 decimals are identical.

The spelling of 1155055113 in words is "one billion, one hundred fifty-five million, fifty-five thousand, one hundred thirteen".