11043523211551 has 4 divisors (see below), whose sum is σ = 11044203708600. Its totient is φ = 11042842714504.

The previous prime is 11043523211527. The next prime is 11043523211569. The reversal of 11043523211551 is 15511232534011.

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 11043523211551 - 2⁵ = 11043523211519 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 (11043523211251) 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, 340224181 + ... + 340256638.

It is an arithmetic number, because the mean of its divisors is an integer number (2761050927150).

Almost surely, 2^{11043523211551} is an apocalyptic number.

11043523211551 is a deficient number, since it is larger than the sum of its proper divisors (680497049).

11043523211551 is an equidigital number, since it uses as much as digits as its factorization.

11043523211551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680497048.

The product of its (nonzero) digits is 18000, while the sum is 34.

Adding to 11043523211551 its reverse (15511232534011), we get a palindrome (26554755745562).

The spelling of 11043523211551 in words is "eleven trillion, forty-three billion, five hundred twenty-three million, two hundred eleven thousand, five hundred fifty-one".