218439351131542 has 16 divisors (see below), whose sum is σ = 330600251757600. Its totient is φ = 108239510415232.

The previous prime is 218439351131531. The next prime is 218439351131543. The reversal of 218439351131542 is 245131153934812.

It is a self number, because there is not a number n which added to its sum of digits gives 218439351131542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (218439351131543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59000218 + ... + 62593165.

It is an arithmetic number, because the mean of its divisors is an integer number (20662515734850).

Almost surely, 2^{218439351131542} is an apocalyptic number.

218439351131542 is a deficient number, since it is larger than the sum of its proper divisors (112160900626058).

218439351131542 is a wasteful number, since it uses less digits than its factorization.

218439351131542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121601447.

The product of its digits is 3110400, while the sum is 52.

The spelling of 218439351131542 in words is "two hundred eighteen trillion, four hundred thirty-nine billion, three hundred fifty-one million, one hundred thirty-one thousand, five hundred forty-two".