1163231144 has 8 divisors (see below), whose sum is σ = 2181058410. Its totient is φ = 581615568.

The previous prime is 1163231117. The next prime is 1163231159. The reversal of 1163231144 is 4411323611.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1013658244 + 149572900 = 31838^2 + 12230^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 72701939 + ... + 72701954.

Almost surely, 2^1163231144 is an apocalyptic number.

It is an amenable number.

1163231144 is a deficient number, since it is larger than the sum of its proper divisors (1017827266).

1163231144 is a wasteful number, since it uses less digits than its factorization.

1163231144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145403899 (or 145403895 counting only the distinct ones).

The product of its digits is 1728, while the sum is 26.

The square root of 1163231144 is about 34106.1745729421. The cubic root of 1163231144 is about 1051.6922504798.

Adding to 1163231144 its reverse (4411323611), we get a palindrome (5574554755).

The spelling of 1163231144 in words is "one billion, one hundred sixty-three million, two hundred thirty-one thousand, one hundred forty-four".