216507365 has 16 divisors (see below), whose sum is σ = 266435136. Its totient is φ = 168806400.

The previous prime is 216507341. The next prime is 216507367. The reversal of 216507365 is 563705612.

It is not a de Polignac number, because 216507365 - 2¹⁸ = 216245221 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 (216507367) 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, 137030 + ... + 138600.

It is an arithmetic number, because the mean of its divisors is an integer number (16652196).

Almost surely, 2^216507365 is an apocalyptic number.

It is an amenable number.

216507365 is a deficient number, since it is larger than the sum of its proper divisors (49927771).

216507365 is a wasteful number, since it uses less digits than its factorization.

216507365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2260.

The product of its (nonzero) digits is 37800, while the sum is 35.

The square root of 216507365 is about 14714.1892403217. The cubic root of 216507365 is about 600.4694150608.

The spelling of 216507365 in words is "two hundred sixteen million, five hundred seven thousand, three hundred sixty-five".