228981227 has 4 divisors (see below), whose sum is σ = 233853216. Its totient is φ = 224109240.

The previous prime is 228981223. The next prime is 228981229. The reversal of 228981227 is 722189822.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 722189822 = 2 ⋅361094911.

It is a cyclic number.

It is not a de Polignac number, because 228981227 - 2² = 228981223 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (228981223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2435924 + ... + 2436017.

It is an arithmetic number, because the mean of its divisors is an integer number (58463304).

Almost surely, 2^228981227 is an apocalyptic number.

228981227 is a deficient number, since it is larger than the sum of its proper divisors (4871989).

228981227 is an equidigital number, since it uses as much as digits as its factorization.

228981227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4871988.

The product of its digits is 64512, while the sum is 41.

The square root of 228981227 is about 15132.1256603294. The cubic root of 228981227 is about 611.7865986355.

The spelling of 228981227 in words is "two hundred twenty-eight million, nine hundred eighty-one thousand, two hundred twenty-seven".