216244015 has 8 divisors (see below), whose sum is σ = 279453888. Its totient is φ = 159687840.

The previous prime is 216243991. The next prime is 216244057. The reversal of 216244015 is 510442612.

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 216244015 - 2⁷ = 216243887 is a prime.

It is a super-2 number, since 2×216244015² = 93522948046640450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1663351 + ... + 1663480.

It is an arithmetic number, because the mean of its divisors is an integer number (34931736).

Almost surely, 2^216244015 is an apocalyptic number.

216244015 is a deficient number, since it is larger than the sum of its proper divisors (63209873).

216244015 is a wasteful number, since it uses less digits than its factorization.

216244015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3326849.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 216244015 is about 14705.2376723397. The cubic root of 216244015 is about 600.2258547868.

Adding to 216244015 its reverse (510442612), we get a palindrome (726686627).

The spelling of 216244015 in words is "two hundred sixteen million, two hundred forty-four thousand, fifteen".