216102649 has 16 divisors (see below), whose sum is σ = 253327360. Its totient is φ = 180487440.

The previous prime is 216102647. The next prime is 216102659. The reversal of 216102649 is 946201612.

It is not a de Polignac number, because 216102649 - 2¹ = 216102647 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 216102649.

It is not an unprimeable number, because it can be changed into a prime (216102647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 207472 + ... + 208510.

It is an arithmetic number, because the mean of its divisors is an integer number (15832960).

Almost surely, 2^216102649 is an apocalyptic number.

It is an amenable number.

216102649 is a deficient number, since it is larger than the sum of its proper divisors (37224711).

216102649 is a wasteful number, since it uses less digits than its factorization.

216102649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 216102649 is about 14700.4302317993. The cubic root of 216102649 is about 600.0950303183.

The spelling of 216102649 in words is "two hundred sixteen million, one hundred two thousand, six hundred forty-nine".