216602241 has 4 divisors (see below), whose sum is σ = 288802992. Its totient is φ = 144401492.

The previous prime is 216602227. The next prime is 216602251. The reversal of 216602241 is 142206612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 216602241 - 2⁵ = 216602209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (216602251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36100371 + ... + 36100376.

It is an arithmetic number, because the mean of its divisors is an integer number (72200748).

Almost surely, 2^216602241 is an apocalyptic number.

It is an amenable number.

216602241 is a deficient number, since it is larger than the sum of its proper divisors (72200751).

216602241 is an equidigital number, since it uses as much as digits as its factorization.

216602241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72200750.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 216602241 is about 14717.4128500902. The cubic root of 216602241 is about 600.5571131038.

Adding to 216602241 its reverse (142206612), we get a palindrome (358808853).

The spelling of 216602241 in words is "two hundred sixteen million, six hundred two thousand, two hundred forty-one".