215316516 has 12 divisors (see below), whose sum is σ = 502405232. Its totient is φ = 71772168.

The previous prime is 215316467. The next prime is 215316533. The reversal of 215316516 is 615613512.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×215316516² = 92722404124756512, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8971510 + ... + 8971533.

Almost surely, 2^215316516 is an apocalyptic number.

It is an amenable number.

215316516 is an abundant number, since it is smaller than the sum of its proper divisors (287088716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215316516 is a wasteful number, since it uses less digits than its factorization.

215316516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17943050 (or 17943048 counting only the distinct ones).

The product of its digits is 5400, while the sum is 30.

The square root of 215316516 is about 14673.6674352392. The cubic root of 215316516 is about 599.3664757583.

The spelling of 215316516 in words is "two hundred fifteen million, three hundred sixteen thousand, five hundred sixteen".