1143223551 has 10 divisors (see below), whose sum is σ = 1707778512. Its totient is φ = 762148980.

The previous prime is 1143223537. The next prime is 1143223561. The reversal of 1143223551 is 1553223411.

It is not a de Polignac number, because 1143223551 - 2⁵ = 1143223519 is a prime.

It is a super-2 number, since 2×1143223551² = 2613920175122099202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143223561) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7056855 + ... + 7057016.

Almost surely, 2^1143223551 is an apocalyptic number.

1143223551 is a deficient number, since it is larger than the sum of its proper divisors (564554961).

1143223551 is an equidigital number, since it uses as much as digits as its factorization.

1143223551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14113883 (or 14113874 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 1143223551 is about 33811.5890043636. The cubic root of 1143223551 is about 1045.6276384948.

Adding to 1143223551 its reverse (1553223411), we get a palindrome (2696446962).

The spelling of 1143223551 in words is "one billion, one hundred forty-three million, two hundred twenty-three thousand, five hundred fifty-one".