216354631515 has 32 divisors (see below), whose sum is σ = 390659155200. Its totient is φ = 101281998720.

The previous prime is 216354631483. The next prime is 216354631517. The reversal of 216354631515 is 515136453612.

It is a happy number.

It is not a de Polignac number, because 216354631515 - 2⁵ = 216354631483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216354631517) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22602805 + ... + 22612374.

It is an arithmetic number, because the mean of its divisors is an integer number (12208098600).

Almost surely, 2^216354631515 is an apocalyptic number.

216354631515 is a deficient number, since it is larger than the sum of its proper divisors (174304523685).

216354631515 is a wasteful number, since it uses less digits than its factorization.

216354631515 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45215227.

The product of its digits is 324000, while the sum is 42.

The spelling of 216354631515 in words is "two hundred sixteen billion, three hundred fifty-four million, six hundred thirty-one thousand, five hundred fifteen".