216307412985 has 8 divisors (see below), whose sum is σ = 346091860800. Its totient is φ = 115363953584.

The previous prime is 216307412969. The next prime is 216307412987. The reversal of 216307412985 is 589214703612.

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

It is a cyclic number.

It is not a de Polignac number, because 216307412985 - 2⁴ = 216307412969 is a prime.

It is a super-2 number, since 2×216307412985² (a number of 23 digits) contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (216307412987) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7210247085 + ... + 7210247114.

It is an arithmetic number, because the mean of its divisors is an integer number (43261482600).

It is a 2-persistent number, because it is pandigital, and so is 2⋅216307412985 = 432614825970, but 3⋅216307412985 = 648922238955 is not.

Almost surely, 2^216307412985 is an apocalyptic number.

It is an amenable number.

216307412985 is a deficient number, since it is larger than the sum of its proper divisors (129784447815).

216307412985 is a wasteful number, since it uses less digits than its factorization.

216307412985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14420494207.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 216307412985 in words is "two hundred sixteen billion, three hundred seven million, four hundred twelve thousand, nine hundred eighty-five".