218214509930 has 16 divisors (see below), whose sum is σ = 392926398984. Its totient is φ = 87254630400.

The previous prime is 218214509927. The next prime is 218214509969. The reversal of 218214509930 is 39905412812.

It can be written as a sum of positive squares in 4 ways, for example, as 117951720481 + 100262789449 = 343441^2 + 316643^2 .

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, 3867287 + ... + 3923306.

Almost surely, 2^218214509930 is an apocalyptic number.

218214509930 is a deficient number, since it is larger than the sum of its proper divisors (174711889054).

218214509930 is a wasteful number, since it uses less digits than its factorization.

218214509930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7793401.

The product of its (nonzero) digits is 155520, while the sum is 44.

The spelling of 218214509930 in words is "two hundred eighteen billion, two hundred fourteen million, five hundred nine thousand, nine hundred thirty".