216427913 has 8 divisors (see below), whose sum is σ = 233472456. Its totient is φ = 199440000.

The previous prime is 216427909. The next prime is 216427921. The reversal of 216427913 is 319724612.

It can be written as a sum of positive squares in 4 ways, for example, as 24522304 + 191905609 = 4952^2 + 13853^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216427913 - 2² = 216427909 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216427933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6038 + ... + 21663.

It is an arithmetic number, because the mean of its divisors is an integer number (29184057).

Almost surely, 2^216427913 is an apocalyptic number.

It is an amenable number.

216427913 is a deficient number, since it is larger than the sum of its proper divisors (17044543).

216427913 is a wasteful number, since it uses less digits than its factorization.

216427913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28315.

The product of its digits is 18144, while the sum is 35.

The square root of 216427913 is about 14711.4891496408. The cubic root of 216427913 is about 600.3959543835.

The spelling of 216427913 in words is "two hundred sixteen million, four hundred twenty-seven thousand, nine hundred thirteen".