228665719 has 2 divisors, whose sum is σ = 228665720. Its totient is φ = 228665718.

The previous prime is 228665699. The next prime is 228665777. The reversal of 228665719 is 917566822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228665719 - 2⁵ = 228665687 is a prime.

It is a super-2 number, since 2×228665719² = 104576022091573922, 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 (228662719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114332859 + 114332860.

It is an arithmetic number, because the mean of its divisors is an integer number (114332860).

Almost surely, 2^228665719 is an apocalyptic number.

228665719 is a deficient number, since it is larger than the sum of its proper divisors (1).

228665719 is an equidigital number, since it uses as much as digits as its factorization.

228665719 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 46.

The square root of 228665719 is about 15121.6969616508. The cubic root of 228665719 is about 611.5054805560.

The spelling of 228665719 in words is "two hundred twenty-eight million, six hundred sixty-five thousand, seven hundred nineteen".