1143440553 has 8 divisors (see below), whose sum is σ = 1614269088. Its totient is φ = 717452864.

The previous prime is 1143440533. The next prime is 1143440567. The reversal of 1143440553 is 3550443411.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1143440553 - 2⁵ = 1143440521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1143440553.

It is not an unprimeable number, because it can be changed into a prime (1143440503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11210151 + ... + 11210252.

It is an arithmetic number, because the mean of its divisors is an integer number (201783636).

Almost surely, 2^1143440553 is an apocalyptic number.

It is an amenable number.

1143440553 is a deficient number, since it is larger than the sum of its proper divisors (470828535).

1143440553 is a wasteful number, since it uses less digits than its factorization.

1143440553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22420423.

The product of its (nonzero) digits is 14400, while the sum is 30.

The square root of 1143440553 is about 33814.7978405904. The cubic root of 1143440553 is about 1045.6937932242.

Adding to 1143440553 its reverse (3550443411), we get a palindrome (4693883964).

The spelling of 1143440553 in words is "one billion, one hundred forty-three million, four hundred forty thousand, five hundred fifty-three".