216218058 has 64 divisors (see below), whose sum is σ = 507928320. Its totient is φ = 60083712.

The previous prime is 216218017. The next prime is 216218059. The reversal of 216218058 is 850812612.

It is a super-3 number, since 3×216218058³ (a number of 26 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (216218059) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304608 + ... + 305316.

It is an arithmetic number, because the mean of its divisors is an integer number (7936380).

Almost surely, 2^216218058 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216218058, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (253964160).

216218058 is an abundant number, since it is smaller than the sum of its proper divisors (291710262).

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

216218058 is a wasteful number, since it uses less digits than its factorization.

216218058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911.

The product of its (nonzero) digits is 7680, while the sum is 33.

The square root of 216218058 is about 14704.3550691623. The cubic root of 216218058 is about 600.2018376505.

The spelling of 216218058 in words is "two hundred sixteen million, two hundred eighteen thousand, fifty-eight".