218080487 has 2 divisors, whose sum is σ = 218080488. Its totient is φ = 218080486.

The previous prime is 218080469. The next prime is 218080519. The reversal of 218080487 is 784080812.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218080487 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218080487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218080417) 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, 109040243 + 109040244.

It is an arithmetic number, because the mean of its divisors is an integer number (109040244).

Almost surely, 2^218080487 is an apocalyptic number.

218080487 is a deficient number, since it is larger than the sum of its proper divisors (1).

218080487 is an equidigital number, since it uses as much as digits as its factorization.

218080487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28672, while the sum is 38.

The square root of 218080487 is about 14767.5484424464. The cubic root of 218080487 is about 601.9202248568.

The spelling of 218080487 in words is "two hundred eighteen million, eighty thousand, four hundred eighty-seven".