1143220275 has 36 divisors (see below), whose sum is σ = 2055300000. Its totient is φ = 607435200.

The previous prime is 1143220249. The next prime is 1143220279. The reversal of 1143220275 is 5720223411.

It is not a de Polignac number, because 1143220275 - 2¹⁶ = 1143154739 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1143220279) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 51601 + ... + 70349.

Almost surely, 2^1143220275 is an apocalyptic number.

1143220275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1143220275 is a deficient number, since it is larger than the sum of its proper divisors (912079725).

1143220275 is a wasteful number, since it uses less digits than its factorization.

1143220275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19036 (or 19028 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1143220275 is about 33811.5405594007. The cubic root of 1143220275 is about 1045.6266397169.

Adding to 1143220275 its reverse (5720223411), we get a palindrome (6863443686).

The spelling of 1143220275 in words is "one billion, one hundred forty-three million, two hundred twenty thousand, two hundred seventy-five".