218055373 has 2 divisors, whose sum is σ = 218055374. Its totient is φ = 218055372.

The previous prime is 218055371. The next prime is 218055377. The reversal of 218055373 is 373550812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133010089 + 85045284 = 11533^2 + 9222^2 .

It is a cyclic number.

It is not a de Polignac number, because 218055373 - 2¹ = 218055371 is a prime.

Together with 218055371, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218055371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109027686 + 109027687.

It is an arithmetic number, because the mean of its divisors is an integer number (109027687).

Almost surely, 2^218055373 is an apocalyptic number.

It is an amenable number.

218055373 is a deficient number, since it is larger than the sum of its proper divisors (1).

218055373 is an equidigital number, since it uses as much as digits as its factorization.

218055373 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 218055373 is about 14766.6981075662. The cubic root of 218055373 is about 601.8971183957.

The spelling of 218055373 in words is "two hundred eighteen million, fifty-five thousand, three hundred seventy-three".