228137857 has 2 divisors, whose sum is σ = 228137858. Its totient is φ = 228137856.

The previous prime is 228137821. The next prime is 228137863. The reversal of 228137857 is 758731822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 164839921 + 63297936 = 12839^2 + 7956^2 .

It is a cyclic number.

It is not a de Polignac number, because 228137857 - 2¹⁹ = 227613569 is a prime.

It is not a weakly prime, because it can be changed into another prime (228137887) 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, 114068928 + 114068929.

It is an arithmetic number, because the mean of its divisors is an integer number (114068929).

Almost surely, 2^228137857 is an apocalyptic number.

It is an amenable number.

228137857 is a deficient number, since it is larger than the sum of its proper divisors (1).

228137857 is an equidigital number, since it uses as much as digits as its factorization.

228137857 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 43.

The square root of 228137857 is about 15104.2330821528. The cubic root of 228137857 is about 611.0345759714.

The spelling of 228137857 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, eight hundred fifty-seven".