216456613 has 8 divisors (see below), whose sum is σ = 221120928. Its totient is φ = 211841424.

The previous prime is 216456599. The next prime is 216456619. The reversal of 216456613 is 316654612.

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 216456613 - 2²¹ = 214359461 is a prime.

It is a super-2 number, since 2×216456613² = 93706930622863538, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216456619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3306 + ... + 21067.

It is an arithmetic number, because the mean of its divisors is an integer number (27640116).

Almost surely, 2^216456613 is an apocalyptic number.

It is an amenable number.

216456613 is a deficient number, since it is larger than the sum of its proper divisors (4664315).

216456613 is a wasteful number, since it uses less digits than its factorization.

216456613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24563.

The product of its digits is 25920, while the sum is 34.

The square root of 216456613 is about 14712.4645454118. The cubic root of 216456613 is about 600.4224922455.

The spelling of 216456613 in words is "two hundred sixteen million, four hundred fifty-six thousand, six hundred thirteen".