218828413 has 2 divisors, whose sum is σ = 218828414. Its totient is φ = 218828412.

The previous prime is 218828383. The next prime is 218828429. The reversal of 218828413 is 314828812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 126630009 + 92198404 = 11253^2 + 9602^2 .

It is a cyclic number.

It is not a de Polignac number, because 218828413 - 2⁹ = 218827901 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218828443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109414206 + 109414207.

It is an arithmetic number, because the mean of its divisors is an integer number (109414207).

Almost surely, 2^218828413 is an apocalyptic number.

It is an amenable number.

218828413 is a deficient number, since it is larger than the sum of its proper divisors (1).

218828413 is an equidigital number, since it uses as much as digits as its factorization.

218828413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24576, while the sum is 37.

The square root of 218828413 is about 14792.8500634597. The cubic root of 218828413 is about 602.6075522947.

The spelling of 218828413 in words is "two hundred eighteen million, eight hundred twenty-eight thousand, four hundred thirteen".