11243243155 has 4 divisors (see below), whose sum is σ = 13491891792. Its totient is φ = 8994594520.

The previous prime is 11243243149. The next prime is 11243243159. The reversal of 11243243155 is 55134234211.

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

It is not a de Polignac number, because 11243243155 - 2²⁷ = 11109025427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11243243159) 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, 1124324311 + ... + 1124324320.

It is an arithmetic number, because the mean of its divisors is an integer number (3372972948).

Almost surely, 2^11243243155 is an apocalyptic number.

11243243155 is a deficient number, since it is larger than the sum of its proper divisors (2248648637).

11243243155 is an equidigital number, since it uses as much as digits as its factorization.

11243243155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2248648636.

The product of its digits is 14400, while the sum is 31.

Adding to 11243243155 its reverse (55134234211), we get a palindrome (66377477366).

The spelling of 11243243155 in words is "eleven billion, two hundred forty-three million, two hundred forty-three thousand, one hundred fifty-five".