228080221 has 2 divisors, whose sum is σ = 228080222. Its totient is φ = 228080220.

The previous prime is 228080197. The next prime is 228080227. The reversal of 228080221 is 122080822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178222500 + 49857721 = 13350^2 + 7061^2 .

It is a cyclic number.

It is not a de Polignac number, because 228080221 - 2⁷ = 228080093 is a prime.

It is a super-2 number, since 2×228080221² = 104041174422817682, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228080227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114040110 + 114040111.

It is an arithmetic number, because the mean of its divisors is an integer number (114040111).

Almost surely, 2^228080221 is an apocalyptic number.

It is an amenable number.

228080221 is a deficient number, since it is larger than the sum of its proper divisors (1).

228080221 is an equidigital number, since it uses as much as digits as its factorization.

228080221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 25.

The square root of 228080221 is about 15102.3250196783. The cubic root of 228080221 is about 610.9831150470.

The spelling of 228080221 in words is "two hundred twenty-eight million, eighty thousand, two hundred twenty-one".