216654872 has 72 divisors (see below), whose sum is σ = 499056660. Its totient is φ = 87907680.

The previous prime is 216654863. The next prime is 216654883. The reversal of 216654872 is 278456612.

216654872 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216654872² = 93878667122672768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 140747 + ... + 142277.

Almost surely, 2^216654872 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216654872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (249528330).

216654872 is an abundant number, since it is smaller than the sum of its proper divisors (282401788).

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

216654872 is a wasteful number, since it uses less digits than its factorization.

216654872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1589 (or 1559 counting only the distinct ones).

The product of its digits is 161280, while the sum is 41.

The square root of 216654872 is about 14719.2007935214. The cubic root of 216654872 is about 600.6057511996.

The spelling of 216654872 in words is "two hundred sixteen million, six hundred fifty-four thousand, eight hundred seventy-two".