216145415 has 8 divisors (see below), whose sum is σ = 261355248. Its totient is φ = 171595840.

The previous prime is 216145411. The next prime is 216145427. The reversal of 216145415 is 514541612.

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

It is not a de Polignac number, because 216145415 - 2² = 216145411 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 (216145411) 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, 164342 + ... + 165651.

It is an arithmetic number, because the mean of its divisors is an integer number (32669406).

Almost surely, 2^216145415 is an apocalyptic number.

216145415 is a deficient number, since it is larger than the sum of its proper divisors (45209833).

216145415 is a wasteful number, since it uses less digits than its factorization.

216145415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 330129.

The product of its digits is 4800, while the sum is 29.

The square root of 216145415 is about 14701.8847431205. The cubic root of 216145415 is about 600.1346133150.

The spelling of 216145415 in words is "two hundred sixteen million, one hundred forty-five thousand, four hundred fifteen".