221327087 has 2 divisors, whose sum is σ = 221327088.
Its totient is φ = 221327086.
The previous prime is 221327083. The next prime is 221327173. The reversal of 221327087 is 780723122.
It is a weak prime.
It is a cyclic number.
It is not a de Polignac number, because 221327087 - 22 = 221327083 is a prime.
It is a Chen prime.
It is equal to p12191594 and since 221327087 and 12191594 have the same sum of digits, it is a Honaker prime.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (221327083) 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, 110663543 + 110663544.
It is an arithmetic number, because the mean of its divisors is an integer number (110663544).
Almost surely, 2221327087 is an apocalyptic number.
221327087 is a deficient number, since it is larger than the sum of its proper divisors (1).
221327087 is an equidigital number, since it uses as much as digits as its factorization.
221327087 is an odious number, because the sum of its binary digits is odd.
The product of its (nonzero) digits is 9408, while the sum is 32.
The square root of 221327087 is about 14877.0658061326.
The cubic root of 221327087 is about 604.8924855051.
The spelling of 221327087 in words is "two hundred twenty-one million, three hundred twenty-seven thousand, eighty-seven".