11005481 has 4 divisors (see below), whose sum is σ = 11037012. Its totient is φ = 10973952.

The previous prime is 11005459. The next prime is 11005483. The reversal of 11005481 is 18450011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6528025 + 4477456 = 2555^2 + 2116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11005481 is a prime.

It is a super-2 number, since 2×11005481² = 242241224082722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11005483) 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, 15236 + ... + 15941.

It is an arithmetic number, because the mean of its divisors is an integer number (2759253).

Almost surely, 2^11005481 is an apocalyptic number.

It is an amenable number.

11005481 is a deficient number, since it is larger than the sum of its proper divisors (31531).

11005481 is an equidigital number, since it uses as much as digits as its factorization.

11005481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31530.

The product of its (nonzero) digits is 160, while the sum is 20.

The square root of 11005481 is about 3317.4509792912. The cubic root of 11005481 is about 222.4349412110.

Adding to 11005481 its reverse (18450011), we get a palindrome (29455492).

The spelling of 11005481 in words is "eleven million, five thousand, four hundred eighty-one".