216165013 has 8 divisors (see below), whose sum is σ = 229775832. Its totient is φ = 202653696.

The previous prime is 216165011. The next prime is 216165023. The reversal of 216165013 is 310561612.

216165013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 95121009 + 121044004 = 9753^2 + 11002^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 216165013 - 2¹ = 216165011 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 (216165011) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20370 + ... + 29107.

It is an arithmetic number, because the mean of its divisors is an integer number (28721979).

Almost surely, 2^216165013 is an apocalyptic number.

It is an amenable number.

216165013 is a deficient number, since it is larger than the sum of its proper divisors (13610819).

216165013 is a wasteful number, since it uses less digits than its factorization.

216165013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49751.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 216165013 is about 14702.5512411962. The cubic root of 216165013 is about 600.1527509234.

The spelling of 216165013 in words is "two hundred sixteen million, one hundred sixty-five thousand, thirteen".