1155131244 has 36 divisors (see below), whose sum is σ = 2921624160. Its totient is φ = 384818400.

The previous prime is 1155131227. The next prime is 1155131251. The reversal of 1155131244 is 4421315511.

It is a tau number, because it is divible by the number of its divisors (36).

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 11 ways as a sum of consecutive naturals, for example, 59997 + ... + 76875.

Almost surely, 2^1155131244 is an apocalyptic number.

It is an amenable number.

1155131244 is an abundant number, since it is smaller than the sum of its proper divisors (1766492916).

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

1155131244 is a wasteful number, since it uses less digits than its factorization.

1155131244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18790 (or 18785 counting only the distinct ones).

The product of its digits is 2400, while the sum is 27.

The square root of 1155131244 is about 33987.2217752496. The cubic root of 1155131244 is about 1049.2454878823.

Adding to 1155131244 its reverse (4421315511), we get a palindrome (5576446755).

The spelling of 1155131244 in words is "one billion, one hundred fifty-five million, one hundred thirty-one thousand, two hundred forty-four".