228457231 has 2 divisors, whose sum is σ = 228457232. Its totient is φ = 228457230.

The previous prime is 228457219. The next prime is 228457241. The reversal of 228457231 is 132754822.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228457231 - 2⁹ = 228456719 is a prime.

It is a super-2 number, since 2×228457231² = 104385412792374722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228457211) 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 as a sum of consecutive naturals, namely, 114228615 + 114228616.

It is an arithmetic number, because the mean of its divisors is an integer number (114228616).

Almost surely, 2^228457231 is an apocalyptic number.

228457231 is a deficient number, since it is larger than the sum of its proper divisors (1).

228457231 is an equidigital number, since it uses as much as digits as its factorization.

228457231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 34.

The square root of 228457231 is about 15114.8017188450. The cubic root of 228457231 is about 611.3195755269.

The spelling of 228457231 in words is "two hundred twenty-eight million, four hundred fifty-seven thousand, two hundred thirty-one".