218812812353 has 2 divisors, whose sum is σ = 218812812354. Its totient is φ = 218812812352.

The previous prime is 218812812349. The next prime is 218812812377. The reversal of 218812812353 is 353218218812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116248266304 + 102564546049 = 340952^2 + 320257^2 .

It is a cyclic number.

It is not a de Polignac number, because 218812812353 - 2² = 218812812349 is a prime.

It is not a weakly prime, because it can be changed into another prime (218812812313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109406406176 + 109406406177.

It is an arithmetic number, because the mean of its divisors is an integer number (109406406177).

Almost surely, 2^218812812353 is an apocalyptic number.

It is an amenable number.

218812812353 is a deficient number, since it is larger than the sum of its proper divisors (1).

218812812353 is an equidigital number, since it uses as much as digits as its factorization.

218812812353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 184320, while the sum is 44.

The spelling of 218812812353 in words is "two hundred eighteen billion, eight hundred twelve million, eight hundred twelve thousand, three hundred fifty-three".