216670539 has 8 divisors (see below), whose sum is σ = 289120320. Its totient is φ = 144333896.

The previous prime is 216670523. The next prime is 216670543. The reversal of 216670539 is 935076612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216670539 - 2⁴ = 216670523 is a prime.

It is a super-2 number, since 2×216670539² = 93892244941101042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 216670497 and 216670506.

It is not an unprimeable number, because it can be changed into a prime (216670579) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 23709 + ... + 31550.

It is an arithmetic number, because the mean of its divisors is an integer number (36140040).

Almost surely, 2^216670539 is an apocalyptic number.

216670539 is a deficient number, since it is larger than the sum of its proper divisors (72449781).

216670539 is a wasteful number, since it uses less digits than its factorization.

216670539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56569.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 216670539 is about 14719.7329799151. The cubic root of 216670539 is about 600.6202280854.

The spelling of 216670539 in words is "two hundred sixteen million, six hundred seventy thousand, five hundred thirty-nine".