11552312143 has 4 divisors (see below), whose sum is σ = 12054586608. Its totient is φ = 11050037680.

The previous prime is 11552312137. The next prime is 11552312147. The reversal of 11552312143 is 34121325511.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11552312143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11552312147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 251137198 + ... + 251137243.

It is an arithmetic number, because the mean of its divisors is an integer number (3013646652).

Almost surely, 2^11552312143 is an apocalyptic number.

11552312143 is a deficient number, since it is larger than the sum of its proper divisors (502274465).

11552312143 is an equidigital number, since it uses as much as digits as its factorization.

11552312143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502274464.

The product of its digits is 3600, while the sum is 28.

Adding to 11552312143 its reverse (34121325511), we get a palindrome (45673637654).

The spelling of 11552312143 in words is "eleven billion, five hundred fifty-two million, three hundred twelve thousand, one hundred forty-three".