1155181530 has 16 divisors (see below), whose sum is σ = 2772435744. Its totient is φ = 308048400.

The previous prime is 1155181493. The next prime is 1155181549. The reversal of 1155181530 is 351815511.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 38506051 = 1155181530 / (1 + 1 + 5 + 5 + 1 + 8 + 1 + 5 + 3 + 0).

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 19252996 + ... + 19253055.

It is an arithmetic number, because the mean of its divisors is an integer number (173277234).

Almost surely, 2^1155181530 is an apocalyptic number.

1155181530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155181530 is an abundant number, since it is smaller than the sum of its proper divisors (1617254214).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1155181530 is a wasteful number, since it uses less digits than its factorization.

1155181530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38506061.

The product of its (nonzero) digits is 3000, while the sum is 30.

The square root of 1155181530 is about 33987.9615452295. The cubic root of 1155181530 is about 1049.2607131632.

The spelling of 1155181530 in words is "one billion, one hundred fifty-five million, one hundred eighty-one thousand, five hundred thirty".