1155551155 has 16 divisors (see below), whose sum is σ = 1513407744. Its totient is φ = 840019680.

The previous prime is 1155551141. The next prime is 1155551171. The reversal of 1155551155 is 5511555511.

It is not a de Polignac number, because 1155551155 - 2⁵ = 1155551123 is a prime.

It is a nude number because it is divisible by every one of its digits.

It is a Duffinian number.

It is a zygodrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 1155551155.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187432 + ... + 193498.

It is an arithmetic number, because the mean of its divisors is an integer number (94587984).

Almost surely, 2^1155551155 is an apocalyptic number.

1155551155 is a deficient number, since it is larger than the sum of its proper divisors (357856589).

1155551155 is a wasteful number, since it uses less digits than its factorization.

1155551155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9546.

The product of its digits is 15625, while the sum is 34.

The square root of 1155551155 is about 33993.3986973942. The cubic root of 1155551155 is about 1049.3726123534.

The spelling of 1155551155 in words is "one billion, one hundred fifty-five million, five hundred fifty-one thousand, one hundred fifty-five".