1144203131 has 4 divisors (see below), whose sum is σ = 1147482000. Its totient is φ = 1140924264.

The previous prime is 1144203097. The next prime is 1144203157. The reversal of 1144203131 is 1313024411.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1144203131 is a prime.

It is a super-2 number, since 2×1144203131² = 2618401609980406322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1144203331) 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, 1638911 + ... + 1639608.

It is an arithmetic number, because the mean of its divisors is an integer number (286870500).

Almost surely, 2^1144203131 is an apocalyptic number.

1144203131 is a deficient number, since it is larger than the sum of its proper divisors (3278869).

1144203131 is an equidigital number, since it uses as much as digits as its factorization.

1144203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3278868.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1144203131 is about 33826.0717642472. The cubic root of 1144203131 is about 1045.9262046290.

Adding to 1144203131 its reverse (1313024411), we get a palindrome (2457227542).

The spelling of 1144203131 in words is "one billion, one hundred forty-four million, two hundred three thousand, one hundred thirty-one".