22256213 has 8 divisors (see below), whose sum is σ = 26932032. Its totient is φ = 17954496.

The previous prime is 22256209. The next prime is 22256231. The reversal of 22256213 is 31265222.

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

It is not a de Polignac number, because 22256213 - 2² = 22256209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22256243) 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 7 ways as a sum of consecutive naturals, for example, 93395 + ... + 93632.

It is an arithmetic number, because the mean of its divisors is an integer number (3366504).

Almost surely, 2^22256213 is an apocalyptic number.

It is an amenable number.

22256213 is a deficient number, since it is larger than the sum of its proper divisors (4675819).

22256213 is a wasteful number, since it uses less digits than its factorization.

22256213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187051.

The product of its digits is 1440, while the sum is 23.

The square root of 22256213 is about 4717.6490967430. The cubic root of 22256213 is about 281.2874934048.

Subtracting 22256213 from its reverse (31265222), we obtain a palindrome (9009009).

The spelling of 22256213 in words is "twenty-two million, two hundred fifty-six thousand, two hundred thirteen".