11550553 has 4 divisors (see below), whose sum is σ = 13200640. Its totient is φ = 9900468.

The previous prime is 11550551. The next prime is 11550587. The reversal of 11550553 is 35505511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35505511 = 67 ⋅529933.

It is a cyclic number.

It is not a de Polignac number, because 11550553 - 2¹ = 11550551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11550551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 825033 + ... + 825046.

It is an arithmetic number, because the mean of its divisors is an integer number (3300160).

Almost surely, 2^11550553 is an apocalyptic number.

It is an amenable number.

11550553 is a deficient number, since it is larger than the sum of its proper divisors (1650087).

11550553 is an equidigital number, since it uses as much as digits as its factorization.

11550553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650086.

The product of its (nonzero) digits is 1875, while the sum is 25.

The square root of 11550553 is about 3398.6104513463. The cubic root of 11550553 is about 226.0481336901.

It can be divided in two parts, 11 and 550553, that added together give a square (550564 = 742²).

The spelling of 11550553 in words is "eleven million, five hundred fifty thousand, five hundred fifty-three".