1155232155 has 64 divisors (see below), whose sum is σ = 2404712448. Its totient is φ = 459212160.

The previous prime is 1155232147. The next prime is 1155232159. The reversal of 1155232155 is 5512325511.

It is not a de Polignac number, because 1155232155 - 2³ = 1155232147 is a prime.

It is a super-2 number, since 2×1155232155² = 2669122663891888050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155232159) 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 63 ways as a sum of consecutive naturals, for example, 4822 + ... + 48308.

It is an arithmetic number, because the mean of its divisors is an integer number (37573632).

Almost surely, 2^1155232155 is an apocalyptic number.

1155232155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1155232155 is an abundant number, since it is smaller than the sum of its proper divisors (1249480293).

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

1155232155 is a wasteful number, since it uses less digits than its factorization.

1155232155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43536.

The product of its digits is 7500, while the sum is 30.

The square root of 1155232155 is about 33988.7062860592. The cubic root of 1155232155 is about 1049.2760406381.

Adding to 1155232155 its reverse (5512325511), we get a palindrome (6667557666).

The spelling of 1155232155 in words is "one billion, one hundred fifty-five million, two hundred thirty-two thousand, one hundred fifty-five".