228137887 has 2 divisors, whose sum is σ = 228137888. Its totient is φ = 228137886.

The previous prime is 228137869. The next prime is 228137933. The reversal of 228137887 is 788731822.

It is an a-pointer prime, because the next prime (228137933) can be obtained adding 228137887 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228137887 - 2¹⁹ = 227613599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228137857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114068943 + 114068944.

It is an arithmetic number, because the mean of its divisors is an integer number (114068944).

Almost surely, 2^228137887 is an apocalyptic number.

228137887 is a deficient number, since it is larger than the sum of its proper divisors (1).

228137887 is an equidigital number, since it uses as much as digits as its factorization.

228137887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 301056, while the sum is 46.

The square root of 228137887 is about 15104.2340752519. The cubic root of 228137887 is about 611.0346027549.

The spelling of 228137887 in words is "two hundred twenty-eight million, one hundred thirty-seven thousand, eight hundred eighty-seven".