11445553 has 4 divisors (see below), whose sum is σ = 13080640. Its totient is φ = 9810468.

The previous prime is 11445529. The next prime is 11445557. The reversal of 11445553 is 35554411.

11445553 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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.

It is a cyclic number.

It is not a de Polignac number, because 11445553 - 2⁵ = 11445521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11445557) 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, 817533 + ... + 817546.

It is an arithmetic number, because the mean of its divisors is an integer number (3270160).

Almost surely, 2^11445553 is an apocalyptic number.

It is an amenable number.

11445553 is a deficient number, since it is larger than the sum of its proper divisors (1635087).

11445553 is an equidigital number, since it uses as much as digits as its factorization.

11445553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635086.

The product of its digits is 6000, while the sum is 28.

The square root of 11445553 is about 3383.1276949001. The cubic root of 11445553 is about 225.3610860530.

Adding to 11445553 its reverse (35554411), we get a palindrome (46999964).

The spelling of 11445553 in words is "eleven million, four hundred forty-five thousand, five hundred fifty-three".