22211256 has 16 divisors (see below), whose sum is σ = 55528200. Its totient is φ = 7403744.

The previous prime is 22211251. The next prime is 22211279. The reversal of 22211256 is 65211222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22211251) 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, 462711 + ... + 462758.

Almost surely, 2^22211256 is an apocalyptic number.

It is an amenable number.

22211256 is an abundant number, since it is smaller than the sum of its proper divisors (33316944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22211256 is a wasteful number, since it uses less digits than its factorization.

22211256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925478 (or 925474 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 22211256 is about 4712.8819208633. The cubic root of 22211256 is about 281.0979678078.

Adding to 22211256 its reverse (65211222), we get a palindrome (87422478).

The spelling of 22211256 in words is "twenty-two million, two hundred eleven thousand, two hundred fifty-six".