1223535143 has 8 divisors (see below), whose sum is σ = 1266479280. Its totient is φ = 1180641280.

The previous prime is 1223535139. The next prime is 1223535151. The reversal of 1223535143 is 3415353221.

It is a happy number.

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 1223535143 - 2² = 1223535139 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223537143) 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, 40871 + ... + 64167.

It is an arithmetic number, because the mean of its divisors is an integer number (158309910).

Almost surely, 2^1223535143 is an apocalyptic number.

1223535143 is a deficient number, since it is larger than the sum of its proper divisors (42944137).

1223535143 is a wasteful number, since it uses less digits than its factorization.

1223535143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25137.

The product of its digits is 10800, while the sum is 29.

The square root of 1223535143 is about 34979.0672116911. The cubic root of 1223535143 is about 1069.5608128578.

Adding to 1223535143 its reverse (3415353221), we get a palindrome (4638888364).

The spelling of 1223535143 in words is "one billion, two hundred twenty-three million, five hundred thirty-five thousand, one hundred forty-three".