1155103819 has 4 divisors (see below), whose sum is σ = 1179680544. Its totient is φ = 1130527096.

The previous prime is 1155103799. The next prime is 1155103823. The reversal of 1155103819 is 9183015511.

It is a happy number.

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

It is not a de Polignac number, because 1155103819 - 2²¹ = 1153006667 is a prime.

It is a super-2 number, since 2×1155103819² = 2668529665336769522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1155103849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12288292 + ... + 12288385.

It is an arithmetic number, because the mean of its divisors is an integer number (294920136).

Almost surely, 2^1155103819 is an apocalyptic number.

1155103819 is a deficient number, since it is larger than the sum of its proper divisors (24576725).

1155103819 is an equidigital number, since it uses as much as digits as its factorization.

1155103819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24576724.

The product of its (nonzero) digits is 5400, while the sum is 34.

The square root of 1155103819 is about 33986.8183123987. The cubic root of 1155103819 is about 1049.2371841259.

The spelling of 1155103819 in words is "one billion, one hundred fifty-five million, one hundred three thousand, eight hundred nineteen".