216344013 has 16 divisors (see below), whose sum is σ = 304920000. Its totient is φ = 136062720.

The previous prime is 216343979. The next prime is 216344033. The reversal of 216344013 is 310443612.

It is not a de Polignac number, because 216344013 - 2²¹ = 214246861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216344033) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5863 + ... + 21611.

It is an arithmetic number, because the mean of its divisors is an integer number (19057500).

Almost surely, 2^216344013 is an apocalyptic number.

It is an amenable number.

216344013 is a deficient number, since it is larger than the sum of its proper divisors (88575987).

216344013 is a wasteful number, since it uses less digits than its factorization.

216344013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16012.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 216344013 is about 14708.6373604083. The cubic root of 216344013 is about 600.3183616022.

Adding to 216344013 its reverse (310443612), we get a palindrome (526787625).

The spelling of 216344013 in words is "two hundred sixteen million, three hundred forty-four thousand, thirteen".