11131522555 has 4 divisors (see below), whose sum is σ = 13357827072. Its totient is φ = 8905218040.

The previous prime is 11131522489. The next prime is 11131522561. The reversal of 11131522555 is 55522513111.

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

It is not a de Polignac number, because 11131522555 - 2⁹ = 11131522043 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 1113152251 + ... + 1113152260.

It is an arithmetic number, because the mean of its divisors is an integer number (3339456768).

Almost surely, 2^11131522555 is an apocalyptic number.

11131522555 is a deficient number, since it is larger than the sum of its proper divisors (2226304517).

11131522555 is an equidigital number, since it uses as much as digits as its factorization.

11131522555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2226304516.

The product of its digits is 7500, while the sum is 31.

The spelling of 11131522555 in words is "eleven billion, one hundred thirty-one million, five hundred twenty-two thousand, five hundred fifty-five".