11551223424 has 64 divisors (see below), whose sum is σ = 33043177440. Its totient is φ = 3554221056.

The previous prime is 11551223423. The next prime is 11551223447. The reversal of 11551223424 is 42432215511.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 11551223391 and 11551223400.

It is not an unprimeable number, because it can be changed into a prime (11551223423) 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, 1151982 + ... + 1161965.

Almost surely, 2^11551223424 is an apocalyptic number.

It is an amenable number.

11551223424 is an abundant number, since it is smaller than the sum of its proper divisors (21491954016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11551223424 is a wasteful number, since it uses less digits than its factorization.

11551223424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2313977 (or 2313965 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

Adding to 11551223424 its reverse (42432215511), we get a palindrome (53983438935).

The spelling of 11551223424 in words is "eleven billion, five hundred fifty-one million, two hundred twenty-three thousand, four hundred twenty-four".