228631087 has 2 divisors, whose sum is σ = 228631088. Its totient is φ = 228631086.

The previous prime is 228631069. The next prime is 228631133. The reversal of 228631087 is 780136822.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 228631087 - 2¹⁵ = 228598319 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (228631027) 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, 114315543 + 114315544.

It is an arithmetic number, because the mean of its divisors is an integer number (114315544).

Almost surely, 2^228631087 is an apocalyptic number.

228631087 is a deficient number, since it is larger than the sum of its proper divisors (1).

228631087 is an equidigital number, since it uses as much as digits as its factorization.

228631087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 228631087 is about 15120.5518087139. The cubic root of 228631087 is about 611.4746076481.

The spelling of 228631087 in words is "two hundred twenty-eight million, six hundred thirty-one thousand, eighty-seven".