22156775 has 6 divisors (see below), whose sum is σ = 27474432. Its totient is φ = 17725400.

The previous prime is 22156759. The next prime is 22156777. The reversal of 22156775 is 57765122.

It is a happy number.

It is not a de Polignac number, because 22156775 - 2⁴ = 22156759 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 (22156777) 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 5 ways as a sum of consecutive naturals, for example, 443111 + ... + 443160.

It is an arithmetic number, because the mean of its divisors is an integer number (4579072).

Almost surely, 2^22156775 is an apocalyptic number.

22156775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22156775 is a deficient number, since it is larger than the sum of its proper divisors (5317657).

22156775 is an equidigital number, since it uses as much as digits as its factorization.

22156775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 886281 (or 886276 counting only the distinct ones).

The product of its digits is 29400, while the sum is 35.

The square root of 22156775 is about 4707.0983631108. The cubic root of 22156775 is about 280.8679487446.

The spelling of 22156775 in words is "twenty-two million, one hundred fifty-six thousand, seven hundred seventy-five".