1144131231 has 4 divisors (see below), whose sum is σ = 1525508312. Its totient is φ = 762754152.

The previous prime is 1144131187. The next prime is 1144131259. The reversal of 1144131231 is 1321314411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321314411 = 3 ⋅440438137.

It is not a de Polignac number, because 1144131231 - 2¹⁸ = 1143869087 is a prime.

It is a super-2 number, since 2×1144131231² = 2618072547499150722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1144131198 and 1144131207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144131271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190688536 + ... + 190688541.

It is an arithmetic number, because the mean of its divisors is an integer number (381377078).

Almost surely, 2^1144131231 is an apocalyptic number.

1144131231 is a deficient number, since it is larger than the sum of its proper divisors (381377081).

1144131231 is an equidigital number, since it uses as much as digits as its factorization.

1144131231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381377080.

The product of its digits is 288, while the sum is 21.

The square root of 1144131231 is about 33825.0089578702. The cubic root of 1144131231 is about 1045.9042960281.

Adding to 1144131231 its reverse (1321314411), we get a palindrome (2465445642).

The spelling of 1144131231 in words is "one billion, one hundred forty-four million, one hundred thirty-one thousand, two hundred thirty-one".