227522221 has 2 divisors, whose sum is σ = 227522222. Its totient is φ = 227522220.

The previous prime is 227522189. The next prime is 227522257. The reversal of 227522221 is 122225722.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 221592996 + 5929225 = 14886^2 + 2435^2 .

It is a cyclic number.

It is not a de Polignac number, because 227522221 - 2⁵ = 227522189 is a prime.

It is a super-3 number, since 3×227522221³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (227522261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113761110 + 113761111.

It is an arithmetic number, because the mean of its divisors is an integer number (113761111).

Almost surely, 2^227522221 is an apocalyptic number.

It is an amenable number.

227522221 is a deficient number, since it is larger than the sum of its proper divisors (1).

227522221 is an equidigital number, since it uses as much as digits as its factorization.

227522221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 25.

The square root of 227522221 is about 15083.8397299892. The cubic root of 227522221 is about 610.4844498795.

Adding to 227522221 its reverse (122225722), we get a palindrome (349747943).

The spelling of 227522221 in words is "two hundred twenty-seven million, five hundred twenty-two thousand, two hundred twenty-one".