218015485447 has 2 divisors, whose sum is σ = 218015485448. Its totient is φ = 218015485446.

The previous prime is 218015485417. The next prime is 218015485459. The reversal of 218015485447 is 744584510812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218015485447 - 2¹⁵ = 218015452679 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218015485447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218015485417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109007742723 + 109007742724.

It is an arithmetic number, because the mean of its divisors is an integer number (109007742724).

Almost surely, 2^218015485447 is an apocalyptic number.

218015485447 is a deficient number, since it is larger than the sum of its proper divisors (1).

218015485447 is an equidigital number, since it uses as much as digits as its factorization.

218015485447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1433600, while the sum is 49.

The spelling of 218015485447 in words is "two hundred eighteen billion, fifteen million, four hundred eighty-five thousand, four hundred forty-seven".