11512055 has 4 divisors (see below), whose sum is σ = 13814472. Its totient is φ = 9209640.

The previous prime is 11512051. The next prime is 11512073. The reversal of 11512055 is 55021511.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55021511 = 19 ⋅2895869.

It is not a de Polignac number, because 11512055 - 2² = 11512051 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 (11512051) 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, 1151201 + ... + 1151210.

It is an arithmetic number, because the mean of its divisors is an integer number (3453618).

Almost surely, 2^11512055 is an apocalyptic number.

11512055 is a deficient number, since it is larger than the sum of its proper divisors (2302417).

11512055 is an equidigital number, since it uses as much as digits as its factorization.

11512055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2302416.

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 11512055 is about 3392.9419387900. The cubic root of 11512055 is about 225.7967146350.

Adding to 11512055 its reverse (55021511), we get a palindrome (66533566).

The spelling of 11512055 in words is "eleven million, five hundred twelve thousand, fifty-five".