216500651 has 8 divisors (see below), whose sum is σ = 223338384. Its totient is φ = 209769120.

The previous prime is 216500639. The next prime is 216500681. The reversal of 216500651 is 156005612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216500651 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216500651.

It is not an unprimeable number, because it can be changed into a prime (216500681) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22400 + ... + 30573.

It is an arithmetic number, because the mean of its divisors is an integer number (27917298).

Almost surely, 2^216500651 is an apocalyptic number.

216500651 is a deficient number, since it is larger than the sum of its proper divisors (6837733).

216500651 is an equidigital number, since it uses as much as digits as its factorization.

216500651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53101.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 216500651 is about 14713.9610914261. The cubic root of 216500651 is about 600.4632080459.

The spelling of 216500651 in words is "two hundred sixteen million, five hundred thousand, six hundred fifty-one".