227355221 has 2 divisors, whose sum is σ = 227355222. Its totient is φ = 227355220.

The previous prime is 227355173. The next prime is 227355223. The reversal of 227355221 is 122553722.

227355221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 118570321 + 108784900 = 10889^2 + 10430^2 .

It is a cyclic number.

It is not a de Polignac number, because 227355221 - 2¹⁸ = 227093077 is a prime.

Together with 227355223, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_12505277 and since 227355221 and 12505277 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227355223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113677610 + 113677611.

It is an arithmetic number, because the mean of its divisors is an integer number (113677611).

Almost surely, 2^227355221 is an apocalyptic number.

It is an amenable number.

227355221 is a deficient number, since it is larger than the sum of its proper divisors (1).

227355221 is an equidigital number, since it uses as much as digits as its factorization.

227355221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8400, while the sum is 29.

The square root of 227355221 is about 15078.3029880687. The cubic root of 227355221 is about 610.3350492970.

The spelling of 227355221 in words is "two hundred twenty-seven million, three hundred fifty-five thousand, two hundred twenty-one".