227822561 has 4 divisors (see below), whose sum is σ = 230943492. Its totient is φ = 224701632.

The previous prime is 227822549. The next prime is 227822591. The reversal of 227822561 is 165228722.

227822561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 165228722 = 2 ⋅82614361.

It can be written as a sum of positive squares in 2 ways, for example, as 147379600 + 80442961 = 12140^2 + 8969^2 .

It is a cyclic number.

It is not a de Polignac number, because 227822561 - 2¹⁰ = 227821537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (227822501) 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, 1560356 + ... + 1560501.

It is an arithmetic number, because the mean of its divisors is an integer number (57735873).

Almost surely, 2^227822561 is an apocalyptic number.

It is an amenable number.

227822561 is a deficient number, since it is larger than the sum of its proper divisors (3120931).

227822561 is an equidigital number, since it uses as much as digits as its factorization.

227822561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3120930.

The product of its digits is 26880, while the sum is 35.

The square root of 227822561 is about 15093.7921345168. The cubic root of 227822561 is about 610.7529544676.

The spelling of 227822561 in words is "two hundred twenty-seven million, eight hundred twenty-two thousand, five hundred sixty-one".