218539038722 has 16 divisors (see below), whose sum is σ = 339647626872. Its totient is φ = 105375432960.

The previous prime is 218539038703. The next prime is 218539038743. The reversal of 218539038722 is 227830935812.

It can be written as a sum of positive squares in 4 ways, for example, as 168599750881 + 49939287841 = 410609^2 + 223471^2 .

It is a super-2 number, since 2×218539038722² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13059029 + ... + 13075752.

Almost surely, 2^218539038722 is an apocalyptic number.

218539038722 is a deficient number, since it is larger than the sum of its proper divisors (121108588150).

218539038722 is a wasteful number, since it uses less digits than its factorization.

218539038722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26134933.

The product of its (nonzero) digits is 1451520, while the sum is 50.

The spelling of 218539038722 in words is "two hundred eighteen billion, five hundred thirty-nine million, thirty-eight thousand, seven hundred twenty-two".