228147187 has 2 divisors, whose sum is σ = 228147188. Its totient is φ = 228147186.

The previous prime is 228147151. The next prime is 228147209. The reversal of 228147187 is 781741822.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228147187 is a prime.

It is a super-2 number, since 2×228147187² = 104102277872025938, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (228147107) 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, 114073593 + 114073594.

It is an arithmetic number, because the mean of its divisors is an integer number (114073594).

Almost surely, 2^228147187 is an apocalyptic number.

228147187 is a deficient number, since it is larger than the sum of its proper divisors (1).

228147187 is an equidigital number, since it uses as much as digits as its factorization.

228147187 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50176, while the sum is 40.

The square root of 228147187 is about 15104.5419328095. The cubic root of 228147187 is about 611.0429055474.

The spelling of 228147187 in words is "two hundred twenty-eight million, one hundred forty-seven thousand, one hundred eighty-seven".