216705055015 has 16 divisors (see below), whose sum is σ = 260852336640. Its totient is φ = 172826750880.

The previous prime is 216705055013. The next prime is 216705055033. The reversal of 216705055015 is 510550507612.

It is not a de Polignac number, because 216705055015 - 2¹ = 216705055013 is a prime.

It is a super-2 number, since 2×216705055015² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216705055013) 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, 10119970 + ... + 10141360.

It is an arithmetic number, because the mean of its divisors is an integer number (16303271040).

Almost surely, 2^216705055015 is an apocalyptic number.

216705055015 is a deficient number, since it is larger than the sum of its proper divisors (44147281625).

216705055015 is a wasteful number, since it uses less digits than its factorization.

216705055015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27582.

The product of its (nonzero) digits is 52500, while the sum is 37.

The spelling of 216705055015 in words is "two hundred sixteen billion, seven hundred five million, fifty-five thousand, fifteen".