8221955 has 24 divisors (see below), whose sum is σ = 11800368. Its totient is φ = 5479488.

The previous prime is 8221949. The next prime is 8221963. The reversal of 8221955 is 5591228.

It is not a de Polignac number, because 8221955 - 2⁶ = 8221891 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 8612 + ... + 9518.

It is an arithmetic number, because the mean of its divisors is an integer number (491682).

Almost surely, 2^8221955 is an apocalyptic number.

8221955 is a deficient number, since it is larger than the sum of its proper divisors (3578413).

8221955 is a wasteful number, since it uses less digits than its factorization.

8221955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 963 (or 956 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

The square root of 8221955 is about 2867.3951593737. The cubic root of 8221955 is about 201.8327783146.

The spelling of 8221955 in words is "eight million, two hundred twenty-one thousand, nine hundred fifty-five".