1131214144 has 14 divisors (see below), whose sum is σ = 2244753194. Its totient is φ = 565607040.

The previous prime is 1131214141. The next prime is 1131214151. The reversal of 1131214144 is 4414121311.

It can be written as a sum of positive squares in only one way, i.e., 948640000 + 182574144 = 30800^2 + 13512^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131214141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8837547 + ... + 8837674.

Almost surely, 2^1131214144 is an apocalyptic number.

It is an amenable number.

1131214144 is a deficient number, since it is larger than the sum of its proper divisors (1113539050).

1131214144 is an equidigital number, since it uses as much as digits as its factorization.

1131214144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17675233 (or 17675223 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 1131214144 is about 33633.5270823623. The cubic root of 1131214144 is about 1041.9533505739.

Adding to 1131214144 its reverse (4414121311), we get a palindrome (5545335455).

The spelling of 1131214144 in words is "one billion, one hundred thirty-one million, two hundred fourteen thousand, one hundred forty-four".