1105115813 has 4 divisors (see below), whose sum is σ = 1105474380. Its totient is φ = 1104757248.

The previous prime is 1105115801. The next prime is 1105115827. The reversal of 1105115813 is 3185115011.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3185115011 = 13 ⋅245008847.

It can be written as a sum of positive squares in 2 ways, for example, as 134606404 + 970509409 = 11602^2 + 31153^2 .

It is a cyclic number.

It is not a de Polignac number, because 1105115813 - 2¹⁰ = 1105114789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1105115873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174620 + ... + 180837.

It is an arithmetic number, because the mean of its divisors is an integer number (276368595).

Almost surely, 2^1105115813 is an apocalyptic number.

It is an amenable number.

1105115813 is a deficient number, since it is larger than the sum of its proper divisors (358567).

1105115813 is an equidigital number, since it uses as much as digits as its factorization.

1105115813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358566.

The product of its (nonzero) digits is 600, while the sum is 26.

The square root of 1105115813 is about 33243.2822236313. The cubic root of 1105115813 is about 1033.8779295002.

The spelling of 1105115813 in words is "one billion, one hundred five million, one hundred fifteen thousand, eight hundred thirteen".