1155031105 has 4 divisors (see below), whose sum is σ = 1386037332. Its totient is φ = 924024880.

The previous prime is 1155031057. The next prime is 1155031117. The reversal of 1155031105 is 5011305511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5011305511 = 43933 ⋅114067.

It can be written as a sum of positive squares in 2 ways, for example, as 295427344 + 859603761 = 17188^2 + 29319^2 .

It is not a de Polignac number, because 1155031105 - 2²⁵ = 1121476673 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian 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, 115503106 + ... + 115503115.

It is an arithmetic number, because the mean of its divisors is an integer number (346509333).

Almost surely, 2^1155031105 is an apocalyptic number.

It is an amenable number.

1155031105 is a deficient number, since it is larger than the sum of its proper divisors (231006227).

1155031105 is an equidigital number, since it uses as much as digits as its factorization.

1155031105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231006226.

The product of its (nonzero) digits is 375, while the sum is 22.

The square root of 1155031105 is about 33985.7485572997. The cubic root of 1155031105 is about 1049.2151671054.

Adding to 1155031105 its reverse (5011305511), we get a palindrome (6166336616).

The spelling of 1155031105 in words is "one billion, one hundred fifty-five million, thirty-one thousand, one hundred five".