11475551 has 4 divisors (see below), whose sum is σ = 11974512. Its totient is φ = 10976592.

The previous prime is 11475523. The next prime is 11475557. The reversal of 11475551 is 15557411.

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 11475551 - 2¹⁸ = 11213407 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 (11475557) 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, 249446 + ... + 249491.

It is an arithmetic number, because the mean of its divisors is an integer number (2993628).

Almost surely, 2^11475551 is an apocalyptic number.

11475551 is a deficient number, since it is larger than the sum of its proper divisors (498961).

11475551 is an equidigital number, since it uses as much as digits as its factorization.

11475551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498960.

The product of its digits is 3500, while the sum is 29.

The square root of 11475551 is about 3387.5582651816. The cubic root of 11475551 is about 225.5577995504.

The spelling of 11475551 in words is "eleven million, four hundred seventy-five thousand, five hundred fifty-one".