228551087 has 2 divisors, whose sum is σ = 228551088. Its totient is φ = 228551086.

The previous prime is 228551051. The next prime is 228551093. The reversal of 228551087 is 780155822.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-228551087 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 228551087.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228551017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 114275543 + 114275544.

It is an arithmetic number, because the mean of its divisors is an integer number (114275544).

Almost surely, 2^228551087 is an apocalyptic number.

228551087 is a deficient number, since it is larger than the sum of its proper divisors (1).

228551087 is an equidigital number, since it uses as much as digits as its factorization.

228551087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44800, while the sum is 38.

The square root of 228551087 is about 15117.9061711601. The cubic root of 228551087 is about 611.4032792387.

The spelling of 228551087 in words is "two hundred twenty-eight million, five hundred fifty-one thousand, eighty-seven".