216225515 has 8 divisors (see below), whose sum is σ = 283058928. Its totient is φ = 157254880.

The previous prime is 216225511. The next prime is 216225523. The reversal of 216225515 is 515522612.

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

It is not a de Polignac number, because 216225515 - 2² = 216225511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216225511) 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, 1965632 + ... + 1965741.

It is an arithmetic number, because the mean of its divisors is an integer number (35382366).

Almost surely, 2^216225515 is an apocalyptic number.

216225515 is a deficient number, since it is larger than the sum of its proper divisors (66833413).

216225515 is a wasteful number, since it uses less digits than its factorization.

216225515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931389.

The product of its digits is 6000, while the sum is 29.

The square root of 216225515 is about 14704.6086313101. The cubic root of 216225515 is about 600.2087375578.

The spelling of 216225515 in words is "two hundred sixteen million, two hundred twenty-five thousand, five hundred fifteen".