216013005 has 24 divisors (see below), whose sum is σ = 403225368. Its totient is φ = 106344576.

The previous prime is 216012989. The next prime is 216013009. The reversal of 216013005 is 500310612.

It can be written as a sum of positive squares in 4 ways, for example, as 11923209 + 204089796 = 3453^2 + 14286^2 .

It is not a de Polignac number, because 216013005 - 2⁴ = 216012989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216013009) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184042 + ... + 185211.

It is an arithmetic number, because the mean of its divisors is an integer number (16801057).

Almost surely, 2^216013005 is an apocalyptic number.

It is an amenable number.

216013005 is a deficient number, since it is larger than the sum of its proper divisors (187212363).

216013005 is a wasteful number, since it uses less digits than its factorization.

216013005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 369277 (or 369274 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 216013005 is about 14697.3808891244. The cubic root of 216013005 is about 600.0120414250.

Adding to 216013005 its reverse (500310612), we get a palindrome (716323617).

The spelling of 216013005 in words is "two hundred sixteen million, thirteen thousand, five".