216602061 has 24 divisors (see below), whose sum is σ = 314765856. Its totient is φ = 132425280.

The previous prime is 216602047. The next prime is 216602077. The reversal of 216602061 is 160206612.

It is not a de Polignac number, because 216602061 - 2⁷ = 216601933 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216602011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81331 + ... + 83951.

It is an arithmetic number, because the mean of its divisors is an integer number (13115244).

Almost surely, 2^216602061 is an apocalyptic number.

It is an amenable number.

216602061 is a deficient number, since it is larger than the sum of its proper divisors (98163795).

216602061 is a wasteful number, since it uses less digits than its factorization.

216602061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813 (or 2800 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 216602061 is about 14717.4067348837. The cubic root of 216602061 is about 600.5569467461.

Adding to 216602061 its reverse (160206612), we get a palindrome (376808673).

The spelling of 216602061 in words is "two hundred sixteen million, six hundred two thousand, sixty-one".