1155418203 has 48 divisors (see below), whose sum is σ = 1671516000. Its totient is φ = 708922368.

The previous prime is 1155418193. The next prime is 1155418211. The reversal of 1155418203 is 3028145511.

It is not a de Polignac number, because 1155418203 - 2⁸ = 1155417947 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1155418273) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10600113 + ... + 10600221.

It is an arithmetic number, because the mean of its divisors is an integer number (34823250).

Almost surely, 2^1155418203 is an apocalyptic number.

1155418203 is a deficient number, since it is larger than the sum of its proper divisors (516097797).

1155418203 is a wasteful number, since it uses less digits than its factorization.

1155418203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304 (or 267 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 1155418203 is about 33991.4430849883. The cubic root of 1155418203 is about 1049.3323656025.

The spelling of 1155418203 in words is "one billion, one hundred fifty-five million, four hundred eighteen thousand, two hundred three".