216256415 has 8 divisors (see below), whose sum is σ = 263163168. Its totient is φ = 170568160.

The previous prime is 216256399. The next prime is 216256429. The reversal of 216256415 is 514652612.

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

It is not a de Polignac number, because 216256415 - 2⁴ = 216256399 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 304232 + ... + 304941.

It is an arithmetic number, because the mean of its divisors is an integer number (32895396).

Almost surely, 2^216256415 is an apocalyptic number.

216256415 is a deficient number, since it is larger than the sum of its proper divisors (46906753).

216256415 is an equidigital number, since it uses as much as digits as its factorization.

216256415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609249.

The product of its digits is 14400, while the sum is 32.

The square root of 216256415 is about 14705.6592847788. The cubic root of 216256415 is about 600.2373274101.

The spelling of 216256415 in words is "two hundred sixteen million, two hundred fifty-six thousand, four hundred fifteen".