22165550 has 48 divisors (see below), whose sum is σ = 45425664. Its totient is φ = 7980000.

The previous prime is 22165547. The next prime is 22165579. The reversal of 22165550 is 5556122.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 104945 + ... + 105155.

It is an arithmetic number, because the mean of its divisors is an integer number (946368).

Almost surely, 2^22165550 is an apocalyptic number.

22165550 is an abundant number, since it is smaller than the sum of its proper divisors (23260114).

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

22165550 is a wasteful number, since it uses less digits than its factorization.

22165550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425 (or 420 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 22165550 is about 4708.0303737338. The cubic root of 22165550 is about 280.9050222952.

The spelling of 22165550 in words is "twenty-two million, one hundred sixty-five thousand, five hundred fifty".