1143305455 has 4 divisors (see below), whose sum is σ = 1371966552. Its totient is φ = 914644360.

The previous prime is 1143305431. The next prime is 1143305473. The reversal of 1143305455 is 5545033411.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1143305455 - 2²³ = 1134916847 is a prime.

It is a super-3 number, since 3×1143305455³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114330541 + ... + 114330550.

It is an arithmetic number, because the mean of its divisors is an integer number (342991638).

Almost surely, 2^1143305455 is an apocalyptic number.

1143305455 is a deficient number, since it is larger than the sum of its proper divisors (228661097).

1143305455 is an equidigital number, since it uses as much as digits as its factorization.

1143305455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228661096.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 1143305455 is about 33812.8001650263. The cubic root of 1143305455 is about 1045.6526085429.

Adding to 1143305455 its reverse (5545033411), we get a palindrome (6688338866).

The spelling of 1143305455 in words is "one billion, one hundred forty-three million, three hundred five thousand, four hundred fifty-five".