11219905 has 8 divisors (see below), whose sum is σ = 13483584. Its totient is φ = 8962800.

The previous prime is 11219903. The next prime is 11219933. The reversal of 11219905 is 50991211.

11219905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11219905 - 2¹ = 11219903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11219903) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3700 + ... + 6010.

It is an arithmetic number, because the mean of its divisors is an integer number (1685448).

Almost surely, 2^11219905 is an apocalyptic number.

It is an amenable number.

11219905 is a deficient number, since it is larger than the sum of its proper divisors (2263679).

11219905 is an equidigital number, since it uses as much as digits as its factorization.

11219905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3287.

The product of its (nonzero) digits is 810, while the sum is 28.

The square root of 11219905 is about 3349.6126641748. The cubic root of 11219905 is about 223.8702546359.

It can be divided in two parts, 1121 and 9905, that added together give a triangular number (11026 = T₁₄₈).

The spelling of 11219905 in words is "eleven million, two hundred nineteen thousand, nine hundred five".