218388231459 has 16 divisors (see below), whose sum is σ = 334694608800. Its totient is φ = 140571734688.

The previous prime is 218388231437. The next prime is 218388231511. The reversal of 218388231459 is 954132883812.

218388231459 is a `hidden beast` number, since 2 + 1 + 83 + 8 + 82 + 31 + 459 = 666.

It is not a de Polignac number, because 218388231459 - 2²⁹ = 217851360547 is a prime.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (218388231409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 139455304 + ... + 139456869.

It is an arithmetic number, because the mean of its divisors is an integer number (20918413050).

Almost surely, 2^218388231459 is an apocalyptic number.

218388231459 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

218388231459 is a deficient number, since it is larger than the sum of its proper divisors (116306377341).

218388231459 is a wasteful number, since it uses less digits than its factorization.

218388231459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278912211 (or 278912205 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 54.

The spelling of 218388231459 in words is "two hundred eighteen billion, three hundred eighty-eight million, two hundred thirty-one thousand, four hundred fifty-nine".