11552155 has 4 divisors (see below), whose sum is σ = 13862592. Its totient is φ = 9241720.

The previous prime is 11552153. The next prime is 11552159. The reversal of 11552155 is 55125511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55125511 = 7 ⋅7875073.

It is not a de Polignac number, because 11552155 - 2¹ = 11552153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11552153) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1155211 + ... + 1155220.

It is an arithmetic number, because the mean of its divisors is an integer number (3465648).

Almost surely, 2^11552155 is an apocalyptic number.

11552155 is a deficient number, since it is larger than the sum of its proper divisors (2310437).

11552155 is an equidigital number, since it uses as much as digits as its factorization.

11552155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2310436.

The product of its digits is 1250, while the sum is 25.

The square root of 11552155 is about 3398.8461277322. The cubic root of 11552155 is about 226.0585837632.

Adding to 11552155 its reverse (55125511), we get a palindrome (66677666).

The spelling of 11552155 in words is "eleven million, five hundred fifty-two thousand, one hundred fifty-five".