215928841 has 2 divisors, whose sum is σ = 215928842. Its totient is φ = 215928840.

The previous prime is 215928833. The next prime is 215928907. The reversal of 215928841 is 148829512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 201753616 + 14175225 = 14204^2 + 3765^2 .

It is a cyclic number.

It is not a de Polignac number, because 215928841 - 2³ = 215928833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 215928794 and 215928803.

It is not a weakly prime, because it can be changed into another prime (215928341) 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 as a sum of consecutive naturals, namely, 107964420 + 107964421.

It is an arithmetic number, because the mean of its divisors is an integer number (107964421).

Almost surely, 2^215928841 is an apocalyptic number.

It is an amenable number.

215928841 is a deficient number, since it is larger than the sum of its proper divisors (1).

215928841 is an equidigital number, since it uses as much as digits as its factorization.

215928841 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 46080, while the sum is 40.

The square root of 215928841 is about 14694.5173789410. The cubic root of 215928841 is about 599.9341048003.

The spelling of 215928841 in words is "two hundred fifteen million, nine hundred twenty-eight thousand, eight hundred forty-one".