216862513 has 8 divisors (see below), whose sum is σ = 254541632. Its totient is φ = 180858096.

The previous prime is 216862507. The next prime is 216862517. The reversal of 216862513 is 315268612.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216862513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216862517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 418395 + ... + 418912.

It is an arithmetic number, because the mean of its divisors is an integer number (31817704).

Almost surely, 2^216862513 is an apocalyptic number.

It is an amenable number.

216862513 is a deficient number, since it is larger than the sum of its proper divisors (37679119).

216862513 is an equidigital number, since it uses as much as digits as its factorization.

216862513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837351.

The product of its digits is 17280, while the sum is 34.

The square root of 216862513 is about 14726.2525103979. The cubic root of 216862513 is about 600.7975625018.

The spelling of 216862513 in words is "two hundred sixteen million, eight hundred sixty-two thousand, five hundred thirteen".