216613652 has 6 divisors (see below), whose sum is σ = 379073898. Its totient is φ = 108306824.

The previous prime is 216613637. The next prime is 216613669. The reversal of 216613652 is 256316612.

It can be written as a sum of positive squares in only one way, i.e., 115691536 + 100922116 = 10756^2 + 10046^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27076703 + ... + 27076710.

It is an arithmetic number, because the mean of its divisors is an integer number (63178983).

Almost surely, 2^216613652 is an apocalyptic number.

It is an amenable number.

216613652 is a deficient number, since it is larger than the sum of its proper divisors (162460246).

216613652 is a wasteful number, since it uses less digits than its factorization.

216613652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54153417 (or 54153415 counting only the distinct ones).

The product of its digits is 12960, while the sum is 32.

The square root of 216613652 is about 14717.8005150226. The cubic root of 216613652 is about 600.5676590656.

Adding to 216613652 its product of digits (12960), we get a palindrome (216626612).

The spelling of 216613652 in words is "two hundred sixteen million, six hundred thirteen thousand, six hundred fifty-two".