218551081442 has 8 divisors (see below), whose sum is σ = 329233604076. Its totient is φ = 108806546752.

The previous prime is 218551081433. The next prime is 218551081451. The reversal of 218551081442 is 244180155812.

218551081442 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (218551081433) and next prime (218551081451).

It can be written as a sum of positive squares in 2 ways, for example, as 165365035801 + 53186045641 = 406651^2 + 230621^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 218551081442.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234496403 + ... + 234497334.

Almost surely, 2^218551081442 is an apocalyptic number.

218551081442 is a deficient number, since it is larger than the sum of its proper divisors (110682522634).

218551081442 is a wasteful number, since it uses less digits than its factorization.

218551081442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468993972.

The product of its (nonzero) digits is 102400, while the sum is 41.

The spelling of 218551081442 in words is "two hundred eighteen billion, five hundred fifty-one million, eighty-one thousand, four hundred forty-two".