22211913 has 4 divisors (see below), whose sum is σ = 29615888. Its totient is φ = 14807940.

The previous prime is 22211909. The next prime is 22211927. The reversal of 22211913 is 31911222.

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 not a de Polignac number, because 22211913 - 2² = 22211909 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22211913.

It is not an unprimeable number, because it can be changed into a prime (22211953) 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, 3701983 + ... + 3701988.

It is an arithmetic number, because the mean of its divisors is an integer number (7403972).

Almost surely, 2^22211913 is an apocalyptic number.

It is an amenable number.

22211913 is a deficient number, since it is larger than the sum of its proper divisors (7403975).

22211913 is an equidigital number, since it uses as much as digits as its factorization.

22211913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7403974.

The product of its digits is 216, while the sum is 21.

The square root of 22211913 is about 4712.9516229217. The cubic root of 22211913 is about 281.1007393686.

The spelling of 22211913 in words is "twenty-two million, two hundred eleven thousand, nine hundred thirteen".