216606041 has 4 divisors (see below), whose sum is σ = 216703284. Its totient is φ = 216508800.

The previous prime is 216605989. The next prime is 216606053. The reversal of 216606041 is 140606612.

It is a happy number.

216606041 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 169546441 + 47059600 = 13021^2 + 6860^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216606041 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216606041.

It is not an unprimeable number, because it can be changed into a prime (216606241) 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, 45200 + ... + 49761.

It is an arithmetic number, because the mean of its divisors is an integer number (54175821).

Almost surely, 2^216606041 is an apocalyptic number.

It is an amenable number.

216606041 is a deficient number, since it is larger than the sum of its proper divisors (97243).

216606041 is an equidigital number, since it uses as much as digits as its factorization.

216606041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97242.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 216606041 is about 14717.5419483010. The cubic root of 216606041 is about 600.5606250768.

The spelling of 216606041 in words is "two hundred sixteen million, six hundred six thousand, forty-one".