228210869 has 2 divisors, whose sum is σ = 228210870. Its totient is φ = 228210868.

The previous prime is 228210791. The next prime is 228210883. The reversal of 228210869 is 968012822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145491844 + 82719025 = 12062^2 + 9095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228210869 is a prime.

It is a super-2 number, since 2×228210869² = 104160401459470322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228210569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114105434 + 114105435.

It is an arithmetic number, because the mean of its divisors is an integer number (114105435).

Almost surely, 2^228210869 is an apocalyptic number.

It is an amenable number.

228210869 is a deficient number, since it is larger than the sum of its proper divisors (1).

228210869 is an equidigital number, since it uses as much as digits as its factorization.

228210869 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 228210869 is about 15106.6498271457. The cubic root of 228210869 is about 611.0997530806.

The spelling of 228210869 in words is "two hundred twenty-eight million, two hundred ten thousand, eight hundred sixty-nine".