22256164 has 24 divisors (see below), whose sum is σ = 44652608. Its totient is φ = 9508320.

The previous prime is 22256123. The next prime is 22256189. The reversal of 22256164 is 46165222.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9379 + ... + 11509.

Almost surely, 2^22256164 is an apocalyptic number.

22256164 is the 2984-th heptagonal number.

It is an amenable number.

22256164 is an abundant number, since it is smaller than the sum of its proper divisors (22396444).

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

22256164 is a wasteful number, since it uses less digits than its factorization.

22256164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2515 (or 2513 counting only the distinct ones).

The product of its digits is 5760, while the sum is 28.

The square root of 22256164 is about 4717.6439034755. The cubic root of 22256164 is about 281.2872869741.

The spelling of 22256164 in words is "twenty-two million, two hundred fifty-six thousand, one hundred sixty-four".