216216623 has 8 divisors (see below), whose sum is σ = 247712160. Its totient is φ = 184872960.

The previous prime is 216216613. The next prime is 216216631. The reversal of 216216623 is 326612612.

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

It is a cyclic number.

It is not a de Polignac number, because 216216623 - 2⁴ = 216216607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216216613) 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, 34898 + ... + 40623.

It is an arithmetic number, because the mean of its divisors is an integer number (30964020).

Almost surely, 2^216216623 is an apocalyptic number.

216216623 is a deficient number, since it is larger than the sum of its proper divisors (31495537).

216216623 is an equidigital number, since it uses as much as digits as its factorization.

216216623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75937.

The product of its digits is 5184, while the sum is 29.

The square root of 216216623 is about 14704.3062740137. The cubic root of 216216623 is about 600.2005098374.

The spelling of 216216623 in words is "two hundred sixteen million, two hundred sixteen thousand, six hundred twenty-three".