216620200651 has 4 divisors (see below), whose sum is σ = 216711334792. Its totient is φ = 216529066512.

The previous prime is 216620200649. The next prime is 216620200669. The reversal of 216620200651 is 156002026612.

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 216620200651 - 2¹ = 216620200649 is a prime.

It is a super-2 number, since 2×216620200651² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216620200051) 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, 45563505 + ... + 45568258.

It is an arithmetic number, because the mean of its divisors is an integer number (54177833698).

Almost surely, 2^216620200651 is an apocalyptic number.

216620200651 is a deficient number, since it is larger than the sum of its proper divisors (91134141).

216620200651 is an equidigital number, since it uses as much as digits as its factorization.

216620200651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91134140.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 216620200651 in words is "two hundred sixteen billion, six hundred twenty million, two hundred thousand, six hundred fifty-one".