228716447 has 2 divisors, whose sum is σ = 228716448. Its totient is φ = 228716446.

The previous prime is 228716363. The next prime is 228716461. The reversal of 228716447 is 744617822.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 228716447 - 2²⁰ = 227667871 is a prime.

It is a super-2 number, since 2×228716447² = 104622426256607618, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228712447) 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, 114358223 + 114358224.

It is an arithmetic number, because the mean of its divisors is an integer number (114358224).

Almost surely, 2^228716447 is an apocalyptic number.

228716447 is a deficient number, since it is larger than the sum of its proper divisors (1).

228716447 is an equidigital number, since it uses as much as digits as its factorization.

228716447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 41.

The square root of 228716447 is about 15123.3741936117. The cubic root of 228716447 is about 611.5506967148.

The spelling of 228716447 in words is "two hundred twenty-eight million, seven hundred sixteen thousand, four hundred forty-seven".