218135455297 has 2 divisors, whose sum is σ = 218135455298. Its totient is φ = 218135455296.

The previous prime is 218135455261. The next prime is 218135455393. The reversal of 218135455297 is 792554531812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 206124172081 + 12011283216 = 454009^2 + 109596^2 .

It is a cyclic number.

It is not a de Polignac number, because 218135455297 - 2²⁷ = 218001237569 is a prime.

It is not a weakly prime, because it can be changed into another prime (218135455597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109067727648 + 109067727649.

It is an arithmetic number, because the mean of its divisors is an integer number (109067727649).

Almost surely, 2^218135455297 is an apocalyptic number.

It is an amenable number.

218135455297 is a deficient number, since it is larger than the sum of its proper divisors (1).

218135455297 is an equidigital number, since it uses as much as digits as its factorization.

218135455297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024000, while the sum is 52.

The spelling of 218135455297 in words is "two hundred eighteen billion, one hundred thirty-five million, four hundred fifty-five thousand, two hundred ninety-seven".