218482028497 has 2 divisors, whose sum is σ = 218482028498. Its totient is φ = 218482028496.

The previous prime is 218482028431. The next prime is 218482028623. The reversal of 218482028497 is 794820284812.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 216038110401 + 2443918096 = 464799^2 + 49436^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-218482028497 is a prime.

It is not a weakly prime, because it can be changed into another prime (218482025497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109241014248 + 109241014249.

It is an arithmetic number, because the mean of its divisors is an integer number (109241014249).

Almost surely, 2^218482028497 is an apocalyptic number.

It is an amenable number.

218482028497 is a deficient number, since it is larger than the sum of its proper divisors (1).

218482028497 is an equidigital number, since it uses as much as digits as its factorization.

218482028497 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4128768, while the sum is 55.

The spelling of 218482028497 in words is "two hundred eighteen billion, four hundred eighty-two million, twenty-eight thousand, four hundred ninety-seven".