228335291 has 2 divisors, whose sum is σ = 228335292. Its totient is φ = 228335290.

The previous prime is 228335287. The next prime is 228335309. The reversal of 228335291 is 192533822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228335291 - 2² = 228335287 is a prime.

It is not a weakly prime, because it can be changed into another prime (228335221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114167645 + 114167646.

It is an arithmetic number, because the mean of its divisors is an integer number (114167646).

Almost surely, 2^228335291 is an apocalyptic number.

228335291 is a deficient number, since it is larger than the sum of its proper divisors (1).

228335291 is an equidigital number, since it uses as much as digits as its factorization.

228335291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25920, while the sum is 35.

The square root of 228335291 is about 15110.7673862051. The cubic root of 228335291 is about 611.2107913788.

The spelling of 228335291 in words is "two hundred twenty-eight million, three hundred thirty-five thousand, two hundred ninety-one".