1143211444 has 24 divisors (see below), whose sum is σ = 2119625928. Its totient is φ = 537646080.

The previous prime is 1143211439. The next prime is 1143211451. The reversal of 1143211444 is 4441123411.

It can be written as a sum of positive squares in 4 ways, for example, as 158004900 + 985206544 = 12570^2 + 31388^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129904 + ... + 138424.

It is an arithmetic number, because the mean of its divisors is an integer number (88317747).

Almost surely, 2^1143211444 is an apocalyptic number.

It is an amenable number.

1143211444 is a deficient number, since it is larger than the sum of its proper divisors (976414484).

1143211444 is a wasteful number, since it uses less digits than its factorization.

1143211444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10515 (or 10513 counting only the distinct ones).

The product of its digits is 1536, while the sum is 25.

The square root of 1143211444 is about 33811.4099676426. The cubic root of 1143211444 is about 1045.6239473362.

Adding to 1143211444 its reverse (4441123411), we get a palindrome (5584334855).

The spelling of 1143211444 in words is "one billion, one hundred forty-three million, two hundred eleven thousand, four hundred forty-four".