220828187 has 2 divisors, whose sum is σ = 220828188. Its totient is φ = 220828186.

The previous prime is 220828171. The next prime is 220828199. The reversal of 220828187 is 781828022.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 220828187 - 2⁴ = 220828171 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 220828187.

It is not a weakly prime, because it can be changed into another prime (220828087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110414093 + 110414094.

It is an arithmetic number, because the mean of its divisors is an integer number (110414094).

Almost surely, 2^220828187 is an apocalyptic number.

220828187 is a deficient number, since it is larger than the sum of its proper divisors (1).

220828187 is an equidigital number, since it uses as much as digits as its factorization.

220828187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 220828187 is about 14860.2889272046. The cubic root of 220828187 is about 604.4376414993.

The spelling of 220828187 in words is "two hundred twenty million, eight hundred twenty-eight thousand, one hundred eighty-seven".