1155232131 has 8 divisors (see below), whose sum is σ = 1541394624. Its totient is φ = 769612200.

The previous prime is 1155232121. The next prime is 1155232147. The reversal of 1155232131 is 1312325511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1155232131 - 2¹⁵ = 1155199363 is a prime.

It is a super-2 number, since 2×1155232131² = 2669122552989602322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1155232121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130645 + ... + 139206.

It is an arithmetic number, because the mean of its divisors is an integer number (192674328).

Almost surely, 2^1155232131 is an apocalyptic number.

1155232131 is a deficient number, since it is larger than the sum of its proper divisors (386162493).

1155232131 is a wasteful number, since it uses less digits than its factorization.

1155232131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271281.

The product of its digits is 900, while the sum is 24.

The square root of 1155232131 is about 33988.7059330007. The cubic root of 1155232131 is about 1049.2760333718.

Adding to 1155232131 its reverse (1312325511), we get a palindrome (2467557642).

The spelling of 1155232131 in words is "one billion, one hundred fifty-five million, two hundred thirty-two thousand, one hundred thirty-one".