218116485 has 24 divisors (see below), whose sum is σ = 397968480. Its totient is φ = 110205792.

The previous prime is 218116471. The next prime is 218116487. The reversal of 218116485 is 584611812.

218116485 is a `hidden beast` number, since 2 + 1 + 8 + 1 + 1 + 648 + 5 = 666.

It is not a de Polignac number, because 218116485 - 2⁷ = 218116357 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218116487) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 126699 + ... + 128408.

It is an arithmetic number, because the mean of its divisors is an integer number (16582020).

Almost surely, 2^218116485 is an apocalyptic number.

It is an amenable number.

218116485 is a deficient number, since it is larger than the sum of its proper divisors (179851995).

218116485 is a wasteful number, since it uses less digits than its factorization.

218116485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255137 (or 255134 counting only the distinct ones).

The product of its digits is 15360, while the sum is 36.

The square root of 218116485 is about 14768.7672132782. The cubic root of 218116485 is about 601.9533421895.

The spelling of 218116485 in words is "two hundred eighteen million, one hundred sixteen thousand, four hundred eighty-five".