216510382 has 24 divisors (see below), whose sum is σ = 362030256. Its totient is φ = 97020000.

The previous prime is 216510337. The next prime is 216510383. The reversal of 216510382 is 283015612.

It is a self number, because there is not a number n which added to its sum of digits gives 216510382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216510383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10882 + ... + 23482.

It is an arithmetic number, because the mean of its divisors is an integer number (15084594).

Almost surely, 2^216510382 is an apocalyptic number.

216510382 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

216510382 is a deficient number, since it is larger than the sum of its proper divisors (145519874).

216510382 is a wasteful number, since it uses less digits than its factorization.

216510382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12696 (or 12685 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 216510382 is about 14714.2917600542. The cubic root of 216510382 is about 600.4722042004.

Adding to 216510382 its reverse (283015612), we get a palindrome (499525994).

The spelling of 216510382 in words is "two hundred sixteen million, five hundred ten thousand, three hundred eighty-two".