216620563 has 4 divisors (see below), whose sum is σ = 216982800. Its totient is φ = 216258328.

The previous prime is 216620561. The next prime is 216620611. The reversal of 216620563 is 365026612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216620563 - 2¹ = 216620561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216620561) 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, 180220 + ... + 181417.

It is an arithmetic number, because the mean of its divisors is an integer number (54245700).

Almost surely, 2^216620563 is an apocalyptic number.

216620563 is a deficient number, since it is larger than the sum of its proper divisors (362237).

216620563 is an equidigital number, since it uses as much as digits as its factorization.

216620563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362236.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 216620563 is about 14718.0352968730. The cubic root of 216620563 is about 600.5740459806.

The spelling of 216620563 in words is "two hundred sixteen million, six hundred twenty thousand, five hundred sixty-three".