216838654 has 8 divisors (see below), whose sum is σ = 326654640. Its totient is φ = 107953776.

The previous prime is 216838651. The next prime is 216838663. The reversal of 216838654 is 456838612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 216838654.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216838651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232194 + ... + 233125.

It is an arithmetic number, because the mean of its divisors is an integer number (40831830).

Almost surely, 2^216838654 is an apocalyptic number.

216838654 is a deficient number, since it is larger than the sum of its proper divisors (109815986).

216838654 is a wasteful number, since it uses less digits than its factorization.

216838654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 465554.

The product of its digits is 276480, while the sum is 43.

The square root of 216838654 is about 14725.4424042200. The cubic root of 216838654 is about 600.7755286418.

The spelling of 216838654 in words is "two hundred sixteen million, eight hundred thirty-eight thousand, six hundred fifty-four".