228202889 has 2 divisors, whose sum is σ = 228202890. Its totient is φ = 228202888.

The previous prime is 228202831. The next prime is 228202921. The reversal of 228202889 is 988202822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 170746489 + 57456400 = 13067^2 + 7580^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228202889 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (228202489) 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, 114101444 + 114101445.

It is an arithmetic number, because the mean of its divisors is an integer number (114101445).

Almost surely, 2^228202889 is an apocalyptic number.

It is an amenable number.

228202889 is a deficient number, since it is larger than the sum of its proper divisors (1).

228202889 is an equidigital number, since it uses as much as digits as its factorization.

228202889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73728, while the sum is 41.

The square root of 228202889 is about 15106.3857027417. The cubic root of 228202889 is about 611.0926300882.

The spelling of 228202889 in words is "two hundred twenty-eight million, two hundred two thousand, eight hundred eighty-nine".