216602385 has 32 divisors (see below), whose sum is σ = 370476288. Its totient is φ = 107796480.

The previous prime is 216602383. The next prime is 216602447. The reversal of 216602385 is 583206612.

It is not a de Polignac number, because 216602385 - 2¹ = 216602383 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216602383) 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 31 ways as a sum of consecutive naturals, for example, 6489 + ... + 21801.

It is an arithmetic number, because the mean of its divisors is an integer number (11577384).

Almost surely, 2^216602385 is an apocalyptic number.

It is an amenable number.

216602385 is a deficient number, since it is larger than the sum of its proper divisors (153873903).

216602385 is a wasteful number, since it uses less digits than its factorization.

216602385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15385.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 216602385 is about 14717.4177422536. The cubic root of 216602385 is about 600.5572461898.

Adding to 216602385 its reverse (583206612), we get a palindrome (799808997).

The spelling of 216602385 in words is "two hundred sixteen million, six hundred two thousand, three hundred eighty-five".