11109481 has 4 divisors (see below), whose sum is σ = 11135572. Its totient is φ = 11083392.

The previous prime is 11109479. The next prime is 11109487. The reversal of 11109481 is 18490111.

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 2205225 + 8904256 = 1485^2 + 2984^2 .

It is a cyclic number.

It is not a de Polignac number, because 11109481 - 2¹ = 11109479 is a prime.

It is a super-2 number, since 2×11109481² = 246841136178722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11109487) 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, 12396 + ... + 13261.

It is an arithmetic number, because the mean of its divisors is an integer number (2783893).

Almost surely, 2^11109481 is an apocalyptic number.

It is an amenable number.

11109481 is a deficient number, since it is larger than the sum of its proper divisors (26091).

11109481 is an equidigital number, since it uses as much as digits as its factorization.

11109481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26090.

The product of its (nonzero) digits is 288, while the sum is 25.

The square root of 11109481 is about 3333.0888076977. The cubic root of 11109481 is about 223.1334036595.

Adding to 11109481 its reverse (18490111), we get a palindrome (29599592).

The spelling of 11109481 in words is "eleven million, one hundred nine thousand, four hundred eighty-one".