228058221 has 4 divisors (see below), whose sum is σ = 304077632. Its totient is φ = 152038812.

The previous prime is 228058189. The next prime is 228058249. The reversal of 228058221 is 122850822.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 228058221 - 2⁵ = 228058189 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 (228058261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38009701 + ... + 38009706.

It is an arithmetic number, because the mean of its divisors is an integer number (76019408).

Almost surely, 2^228058221 is an apocalyptic number.

It is an amenable number.

228058221 is a deficient number, since it is larger than the sum of its proper divisors (76019411).

228058221 is an equidigital number, since it uses as much as digits as its factorization.

228058221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76019410.

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 228058221 is about 15101.5966374420. The cubic root of 228058221 is about 610.9634698236.

The spelling of 228058221 in words is "two hundred twenty-eight million, fifty-eight thousand, two hundred twenty-one".