216515013 has 64 divisors (see below), whose sum is σ = 361912320. Its totient is φ = 113184000.

The previous prime is 216515003. The next prime is 216515023. The reversal of 216515013 is 310515612.

It is an interprime number because it is at equal distance from previous prime (216515003) and next prime (216515023).

It is not a de Polignac number, because 216515013 - 2¹⁶ = 216449477 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216515003) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 823120 + ... + 823382.

It is an arithmetic number, because the mean of its divisors is an integer number (5654880).

Almost surely, 2^216515013 is an apocalyptic number.

It is an amenable number.

216515013 is a deficient number, since it is larger than the sum of its proper divisors (145397307).

216515013 is a wasteful number, since it uses less digits than its factorization.

216515013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410.

The product of its (nonzero) digits is 900, while the sum is 24.

The square root of 216515013 is about 14714.4491232258. The cubic root of 216515013 is about 600.4764853915.

The spelling of 216515013 in words is "two hundred sixteen million, five hundred fifteen thousand, thirteen".