216560413 has 4 divisors (see below), whose sum is σ = 219527068. Its totient is φ = 213593760.

The previous prime is 216560411. The next prime is 216560419. The reversal of 216560413 is 314065612.

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 97357689 + 119202724 = 9867^2 + 10918^2 .

It is a cyclic number.

It is not a de Polignac number, because 216560413 - 2¹ = 216560411 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216560411) 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, 1483218 + ... + 1483363.

It is an arithmetic number, because the mean of its divisors is an integer number (54881767).

Almost surely, 2^216560413 is an apocalyptic number.

It is an amenable number.

216560413 is a deficient number, since it is larger than the sum of its proper divisors (2966655).

216560413 is an equidigital number, since it uses as much as digits as its factorization.

216560413 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2966654.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 216560413 is about 14715.9917436780. The cubic root of 216560413 is about 600.5184528080.

The spelling of 216560413 in words is "two hundred sixteen million, five hundred sixty thousand, four hundred thirteen".