228687219 has 20 divisors (see below), whose sum is σ = 342338040. Its totient is φ = 152137440.

The previous prime is 228687203. The next prime is 228687223. The reversal of 228687219 is 912786822.

It is not a de Polignac number, because 228687219 - 2⁴ = 228687203 is a prime.

It is a super-2 number, since 2×228687219² = 104595688267907922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (228687259) 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 in 19 ways as a sum of consecutive naturals, for example, 39492 + ... + 44910.

It is an arithmetic number, because the mean of its divisors is an integer number (17116902).

Almost surely, 2^228687219 is an apocalyptic number.

228687219 is a deficient number, since it is larger than the sum of its proper divisors (113650821).

228687219 is an equidigital number, since it uses as much as digits as its factorization.

228687219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5952 (or 5943 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 228687219 is about 15122.4078439910. The cubic root of 228687219 is about 611.5246452940.

The spelling of 228687219 in words is "two hundred twenty-eight million, six hundred eighty-seven thousand, two hundred nineteen".