216071515 has 24 divisors (see below), whose sum is σ = 300016080. Its totient is φ = 148864320.

The previous prime is 216071503. The next prime is 216071521. The reversal of 216071515 is 515170612.

216071515 = T₁₈₂₉ + T₁₈₃₀ + ... + T₁₉₄₉.

It is not a de Polignac number, because 216071515 - 2⁵ = 216071483 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2097 + ... + 20893.

It is an arithmetic number, because the mean of its divisors is an integer number (12500670).

Almost surely, 2^216071515 is an apocalyptic number.

216071515 is a deficient number, since it is larger than the sum of its proper divisors (83944565).

216071515 is a wasteful number, since it uses less digits than its factorization.

216071515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18843 (or 18832 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 28.

The square root of 216071515 is about 14699.3712450567. The cubic root of 216071515 is about 600.0662102860.

The spelling of 216071515 in words is "two hundred sixteen million, seventy-one thousand, five hundred fifteen".