227564221 has 4 divisors (see below), whose sum is σ = 231294844. Its totient is φ = 223833600.

The previous prime is 227564203. The next prime is 227564237. The reversal of 227564221 is 122465722.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20520900 + 207043321 = 4530^2 + 14389^2 .

It is a cyclic number.

It is not a de Polignac number, because 227564221 - 2²³ = 219175613 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 (227564201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1865220 + ... + 1865341.

It is an arithmetic number, because the mean of its divisors is an integer number (57823711).

Almost surely, 2^227564221 is an apocalyptic number.

It is an amenable number.

227564221 is a deficient number, since it is larger than the sum of its proper divisors (3730623).

227564221 is an equidigital number, since it uses as much as digits as its factorization.

227564221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3730622.

The product of its digits is 13440, while the sum is 31.

The square root of 227564221 is about 15085.2318841972. The cubic root of 227564221 is about 610.5220121731.

The spelling of 227564221 in words is "two hundred twenty-seven million, five hundred sixty-four thousand, two hundred twenty-one".