205511227 has 2 divisors, whose sum is σ = 205511228. Its totient is φ = 205511226.

The previous prime is 205511221. The next prime is 205511231. The reversal of 205511227 is 722115502.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-205511227 is a prime.

It is not a weakly prime, because it can be changed into another prime (205511221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102755613 + 102755614.

It is an arithmetic number, because the mean of its divisors is an integer number (102755614).

Almost surely, 2^205511227 is an apocalyptic number.

205511227 is a deficient number, since it is larger than the sum of its proper divisors (1).

205511227 is an equidigital number, since it uses as much as digits as its factorization.

205511227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 205511227 is about 14335.6627680760. The cubic root of 205511227 is about 590.1265906668.

Adding to 205511227 its reverse (722115502), we get a palindrome (927626729).

The spelling of 205511227 in words is "two hundred five million, five hundred eleven thousand, two hundred twenty-seven".