228251 has 2 divisors, whose sum is σ = 228252. Its totient is φ = 228250.

The previous prime is 228233. The next prime is 228257. The reversal of 228251 is 152822.

228251 is nontrivially palindromic in base 12.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228251 - 2¹⁴ = 211867 is a prime.

It is a Sophie Germain prime.

It is equal to p₂₀₂₇₉ and since 228251 and 20279 have the same sum of digits, it is a Honaker prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 228251.

It is not a weakly prime, because it can be changed into another prime (228257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114125 + 114126.

It is an arithmetic number, because the mean of its divisors is an integer number (114126).

2²²⁸²⁵¹ is an apocalyptic number.

228251 is a deficient number, since it is larger than the sum of its proper divisors (1).

228251 is an equidigital number, since it uses as much as digits as its factorization.

228251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 320, while the sum is 20.

The square root of 228251 is about 477.7562139837. The cubic root of 228251 is about 61.1135571718.

The spelling of 228251 in words is "two hundred twenty-eight thousand, two hundred fifty-one".