218472855 has 8 divisors (see below), whose sum is σ = 349556592. Its totient is φ = 116518848.

The previous prime is 218472853. The next prime is 218472871. The reversal of 218472855 is 558274812.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 218472855 - 2¹ = 218472853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218472851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7282414 + ... + 7282443.

It is an arithmetic number, because the mean of its divisors is an integer number (43694574).

Almost surely, 2^218472855 is an apocalyptic number.

218472855 is a deficient number, since it is larger than the sum of its proper divisors (131083737).

218472855 is a wasteful number, since it uses less digits than its factorization.

218472855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14564865.

The product of its digits is 179200, while the sum is 42.

The square root of 218472855 is about 14780.8272772535. The cubic root of 218472855 is about 602.2809979804.

The spelling of 218472855 in words is "two hundred eighteen million, four hundred seventy-two thousand, eight hundred fifty-five".