216248387 has 8 divisors (see below), whose sum is σ = 222364752. Its totient is φ = 210146400.

The previous prime is 216248377. The next prime is 216248407. The reversal of 216248387 is 783842612.

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-216248387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216248377) 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, 31712 + ... + 37922.

It is an arithmetic number, because the mean of its divisors is an integer number (27795594).

Almost surely, 2^216248387 is an apocalyptic number.

216248387 is a deficient number, since it is larger than the sum of its proper divisors (6116365).

216248387 is an equidigital number, since it uses as much as digits as its factorization.

216248387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7189.

The product of its digits is 129024, while the sum is 41.

The square root of 216248387 is about 14705.3863261051. The cubic root of 216248387 is about 600.2298998618.

The spelling of 216248387 in words is "two hundred sixteen million, two hundred forty-eight thousand, three hundred eighty-seven".