216120654 has 24 divisors (see below), whose sum is σ = 483367872. Its totient is φ = 69716160.

The previous prime is 216120647. The next prime is 216120679. The reversal of 216120654 is 456021612.

216120654 is a `hidden beast` number, since 2 + 1 + 6 + 1 + 2 + 0 + 654 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 193099 + ... + 194214.

It is an arithmetic number, because the mean of its divisors is an integer number (20140328).

Almost surely, 2^216120654 is an apocalyptic number.

216120654 is an abundant number, since it is smaller than the sum of its proper divisors (267247218).

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

216120654 is a wasteful number, since it uses less digits than its factorization.

216120654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387352 (or 387349 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 216120654 is about 14701.0426160868. The cubic root of 216120654 is about 600.1116958721. Note that the first 3 decimals are identical.

The spelling of 216120654 in words is "two hundred sixteen million, one hundred twenty thousand, six hundred fifty-four".