218058138 has 12 divisors (see below), whose sum is σ = 472459338. Its totient is φ = 72686040.

The previous prime is 218058119. The next prime is 218058143. The reversal of 218058138 is 831850812.

It can be written as a sum of positive squares in only one way, i.e., 125955729 + 92102409 = 11223^2 + 9597^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6057153 + ... + 6057188.

Almost surely, 2^218058138 is an apocalyptic number.

218058138 is an abundant number, since it is smaller than the sum of its proper divisors (254401200).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

218058138 is a wasteful number, since it uses less digits than its factorization.

218058138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12114349 (or 12114346 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 218058138 is about 14766.7917300949. The cubic root of 218058138 is about 601.8996624567.

The spelling of 218058138 in words is "two hundred eighteen million, fifty-eight thousand, one hundred thirty-eight".