216512365 has 8 divisors (see below), whose sum is σ = 259894368. Its totient is φ = 173156880.

The previous prime is 216512333. The next prime is 216512369. The reversal of 216512365 is 563215612.

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

It is not a de Polignac number, because 216512365 - 2⁵ = 216512333 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 (216512369) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25510 + ... + 32920.

It is an arithmetic number, because the mean of its divisors is an integer number (32486796).

Almost surely, 2^216512365 is an apocalyptic number.

It is an amenable number.

216512365 is a deficient number, since it is larger than the sum of its proper divisors (43382003).

216512365 is an equidigital number, since it uses as much as digits as its factorization.

216512365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13259.

The product of its digits is 10800, while the sum is 31.

The square root of 216512365 is about 14714.3591433674. The cubic root of 216512365 is about 600.4740374193.

Adding to 216512365 its reverse (563215612), we get a palindrome (779727977).

The spelling of 216512365 in words is "two hundred sixteen million, five hundred twelve thousand, three hundred sixty-five".