11815055 has 32 divisors (see below), whose sum is σ = 17318400. Its totient is φ = 7558272.

The previous prime is 11815043. The next prime is 11815073. The reversal of 11815055 is 55051811.

It is a cyclic number.

It is not a de Polignac number, because 11815055 - 2⁶ = 11814991 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72404 + ... + 72566.

It is an arithmetic number, because the mean of its divisors is an integer number (541200).

Almost surely, 2^11815055 is an apocalyptic number.

11815055 is a deficient number, since it is larger than the sum of its proper divisors (5503345).

11815055 is a wasteful number, since it uses less digits than its factorization.

11815055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303.

The product of its (nonzero) digits is 1000, while the sum is 26.

The square root of 11815055 is about 3437.3034489262. The cubic root of 11815055 is about 227.7605917806.

Adding to 11815055 its reverse (55051811), we get a palindrome (66866866).

The spelling of 11815055 in words is "eleven million, eight hundred fifteen thousand, fifty-five".