216254609 has 8 divisors (see below), whose sum is σ = 217728000. Its totient is φ = 214786432.

The previous prime is 216254587. The next prime is 216254617. The reversal of 216254609 is 906452612.

It is a happy number.

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

It is not a de Polignac number, because 216254609 - 2²⁴ = 199477393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216254629) 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 in 7 ways as a sum of consecutive naturals, for example, 113537 + ... + 115425.

It is an arithmetic number, because the mean of its divisors is an integer number (27216000).

Almost surely, 2^216254609 is an apocalyptic number.

It is an amenable number.

216254609 is a deficient number, since it is larger than the sum of its proper divisors (1473391).

216254609 is a wasteful number, since it uses less digits than its factorization.

216254609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2607.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 216254609 is about 14705.5978797191. The cubic root of 216254609 is about 600.2356565053.

The spelling of 216254609 in words is "two hundred sixteen million, two hundred fifty-four thousand, six hundred nine".