216650256 has 40 divisors (see below), whose sum is σ = 560499840. Its totient is φ = 72110976.

The previous prime is 216650249. The next prime is 216650299. The reversal of 216650256 is 652056612.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34185 + ... + 40023.

It is an arithmetic number, because the mean of its divisors is an integer number (14012496).

Almost surely, 2^216650256 is an apocalyptic number.

It is an amenable number.

216650256 is an abundant number, since it is smaller than the sum of its proper divisors (343849584).

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

216650256 is a wasteful number, since it uses less digits than its factorization.

216650256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6623 (or 6617 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 216650256 is about 14719.0439906945. The cubic root of 216650256 is about 600.6014857123.

The spelling of 216650256 in words is "two hundred sixteen million, six hundred fifty thousand, two hundred fifty-six".