11312213543 has 4 divisors (see below), whose sum is σ = 11322998400. Its totient is φ = 11301428688.

The previous prime is 11312213531. The next prime is 11312213551. The reversal of 11312213543 is 34531221311.

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

It is a cyclic number.

It is not a de Polignac number, because 11312213543 - 2²⁰ = 11311164967 is a prime.

It is a super-2 number, since 2×11312213543² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11312213243) 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, 5390855 + ... + 5392952.

It is an arithmetic number, because the mean of its divisors is an integer number (2830749600).

Almost surely, 2^11312213543 is an apocalyptic number.

11312213543 is a deficient number, since it is larger than the sum of its proper divisors (10784857).

11312213543 is a wasteful number, since it uses less digits than its factorization.

11312213543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10784856.

The product of its digits is 2160, while the sum is 26.

Adding to 11312213543 its reverse (34531221311), we get a palindrome (45843434854).

The spelling of 11312213543 in words is "eleven billion, three hundred twelve million, two hundred thirteen thousand, five hundred forty-three".