228556987 has 2 divisors, whose sum is σ = 228556988. Its totient is φ = 228556986.

The previous prime is 228556981. The next prime is 228557081. The reversal of 228556987 is 789655822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228556987 - 2¹¹ = 228554939 is a prime.

It is not a weakly prime, because it can be changed into another prime (228556981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114278493 + 114278494.

It is an arithmetic number, because the mean of its divisors is an integer number (114278494).

Almost surely, 2^228556987 is an apocalyptic number.

228556987 is a deficient number, since it is larger than the sum of its proper divisors (1).

228556987 is an equidigital number, since it uses as much as digits as its factorization.

228556987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2419200, while the sum is 52.

The square root of 228556987 is about 15118.1013027430. The cubic root of 228556987 is about 611.4085402774.

The spelling of 228556987 in words is "two hundred twenty-eight million, five hundred fifty-six thousand, nine hundred eighty-seven".