11003205551 has 8 divisors (see below), whose sum is σ = 11879459424. Its totient is φ = 10131216480.

The previous prime is 11003205509. The next prime is 11003205569. The reversal of 11003205551 is 15550230011.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11003205551 - 2⁶ = 11003205487 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 (11003205581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1060835 + ... + 1071156.

It is an arithmetic number, because the mean of its divisors is an integer number (1484932428).

Almost surely, 2^11003205551 is an apocalyptic number.

11003205551 is a deficient number, since it is larger than the sum of its proper divisors (876253873).

11003205551 is a wasteful number, since it uses less digits than its factorization.

11003205551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132401.

The product of its (nonzero) digits is 750, while the sum is 23.

Adding to 11003205551 its reverse (15550230011), we get a palindrome (26553435562).

The spelling of 11003205551 in words is "eleven billion, three million, two hundred five thousand, five hundred fifty-one".