218497348907 has 2 divisors, whose sum is σ = 218497348908. Its totient is φ = 218497348906.

The previous prime is 218497348837. The next prime is 218497348939. The reversal of 218497348907 is 709843794812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218497348907 - 2⁸ = 218497348651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 218497348907.

It is not a weakly prime, because it can be changed into another prime (218497348007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109248674453 + 109248674454.

It is an arithmetic number, because the mean of its divisors is an integer number (109248674454).

Almost surely, 2^218497348907 is an apocalyptic number.

218497348907 is a deficient number, since it is larger than the sum of its proper divisors (1).

218497348907 is an equidigital number, since it uses as much as digits as its factorization.

218497348907 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24385536, while the sum is 62.

Adding to 218497348907 its sum of digits (62), we get a square (218497348969 = 467437²).

The spelling of 218497348907 in words is "two hundred eighteen billion, four hundred ninety-seven million, three hundred forty-eight thousand, nine hundred seven".