216326515 has 16 divisors (see below), whose sum is σ = 271576800. Its totient is φ = 165206272.

The previous prime is 216326489. The next prime is 216326543. The reversal of 216326515 is 515623612.

It is not a de Polignac number, because 216326515 - 2⁵ = 216326483 is a prime.

It is a super-2 number, since 2×216326515² = 93594322184090450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4524 + ... + 21286.

It is an arithmetic number, because the mean of its divisors is an integer number (16973550).

Almost surely, 2^216326515 is an apocalyptic number.

216326515 is a deficient number, since it is larger than the sum of its proper divisors (55250285).

216326515 is a wasteful number, since it uses less digits than its factorization.

216326515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16886.

The product of its digits is 10800, while the sum is 31.

The square root of 216326515 is about 14708.0425278145. The cubic root of 216326515 is about 600.3021764938.

The spelling of 216326515 in words is "two hundred sixteen million, three hundred twenty-six thousand, five hundred fifteen".