4855221 has 20 divisors (see below), whose sum is σ = 8289952. Its totient is φ = 2774088.

The previous prime is 4855219. The next prime is 4855223. The reversal of 4855221 is 1225584.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4855219) and next prime (4855223).

It is not a de Polignac number, because 4855221 - 2¹ = 4855219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4855223) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 3715 + ... + 4848.

Almost surely, 2^4855221 is an apocalyptic number.

It is an amenable number.

4855221 is a deficient number, since it is larger than the sum of its proper divisors (3434731).

4855221 is an equidigital number, since it uses as much as digits as its factorization.

4855221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8582 (or 8573 counting only the distinct ones).

The product of its digits is 3200, while the sum is 27.

The square root of 4855221 is about 2203.4566027040. The cubic root of 4855221 is about 169.3309458643.

The spelling of 4855221 in words is "four million, eight hundred fifty-five thousand, two hundred twenty-one".