216024505 has 8 divisors (see below), whose sum is σ = 260115912. Its totient is φ = 172228608.

The previous prime is 216024493. The next prime is 216024517. The reversal of 216024505 is 505420612.

It is an interprime number because it is at equal distance from previous prime (216024493) and next prime (216024517).

It can be written as a sum of positive squares in 4 ways, for example, as 150479289 + 65545216 = 12267^2 + 8096^2 .

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 216024505 - 2⁷ = 216024377 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 216024505.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 72264 + ... + 75193.

It is an arithmetic number, because the mean of its divisors is an integer number (32514489).

Almost surely, 2^216024505 is an apocalyptic number.

It is an amenable number.

216024505 is a deficient number, since it is larger than the sum of its proper divisors (44091407).

216024505 is a wasteful number, since it uses less digits than its factorization.

216024505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147755.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 216024505 is about 14697.7721100853. The cubic root of 216024505 is about 600.0226889568.

The spelling of 216024505 in words is "two hundred sixteen million, twenty-four thousand, five hundred five".