1143622311 has 16 divisors (see below), whose sum is σ = 1669960320. Its totient is φ = 691837920.

The previous prime is 1143622247. The next prime is 1143622339. The reversal of 1143622311 is 1132263411.

It is a happy number.

It is not a de Polignac number, because 1143622311 - 2⁶ = 1143622247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143622111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 246205 + ... + 250806.

It is an arithmetic number, because the mean of its divisors is an integer number (104372520).

Almost surely, 2^1143622311 is an apocalyptic number.

1143622311 is a deficient number, since it is larger than the sum of its proper divisors (526338009).

1143622311 is a wasteful number, since it uses less digits than its factorization.

1143622311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497086.

The product of its digits is 864, while the sum is 24.

The square root of 1143622311 is about 33817.4852849824. The cubic root of 1143622311 is about 1045.7491971080.

Adding to 1143622311 its reverse (1132263411), we get a palindrome (2275885722).

The spelling of 1143622311 in words is "one billion, one hundred forty-three million, six hundred twenty-two thousand, three hundred eleven".