1143311403 has 32 divisors (see below), whose sum is σ = 1700349952. Its totient is φ = 678585600.

The previous prime is 1143311369. The next prime is 1143311413. The reversal of 1143311403 is 3041133411.

It is not a de Polignac number, because 1143311403 - 2¹⁴ = 1143295019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143311403.

It is not an unprimeable number, because it can be changed into a prime (1143311413) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 398751 + ... + 401607.

It is an arithmetic number, because the mean of its divisors is an integer number (53135936).

Almost surely, 2^1143311403 is an apocalyptic number.

1143311403 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1143311403 is a deficient number, since it is larger than the sum of its proper divisors (557038549).

1143311403 is a wasteful number, since it uses less digits than its factorization.

1143311403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3235.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 1143311403 is about 33812.8881197688. Note that the first 3 decimals coincide. The cubic root of 1143311403 is about 1045.6544218614.

Adding to 1143311403 its reverse (3041133411), we get a palindrome (4184444814).

The spelling of 1143311403 in words is "one billion, one hundred forty-three million, three hundred eleven thousand, four hundred three".