1143355455 has 48 divisors (see below), whose sum is σ = 2182287744. Its totient is φ = 549147840.

The previous prime is 1143355453. The next prime is 1143355459. The reversal of 1143355455 is 5545533411.

1143355455 is a `hidden beast` number, since 11 + 43 + 3 + 554 + 55 = 666.

It is not a de Polignac number, because 1143355455 - 2¹ = 1143355453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143355453) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 42172 + ... + 63758.

It is an arithmetic number, because the mean of its divisors is an integer number (45464328).

Almost surely, 2^1143355455 is an apocalyptic number.

1143355455 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1143355455 is a deficient number, since it is larger than the sum of its proper divisors (1038932289).

1143355455 is a wasteful number, since it uses less digits than its factorization.

1143355455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21716 (or 21713 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 1143355455 is about 33813.5395219134. The cubic root of 1143355455 is about 1045.6678514417.

Adding to 1143355455 its reverse (5545533411), we get a palindrome (6688888866).

The spelling of 1143355455 in words is "one billion, one hundred forty-three million, three hundred fifty-five thousand, four hundred fifty-five".