865219216 has 40 divisors (see below), whose sum is σ = 1778323680. Its totient is φ = 406393344.

The previous prime is 865219189. The next prime is 865219217. The reversal of 865219216 is 612912568.

It is not an unprimeable number, because it can be changed into a prime (865219217) 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, 156955 + ... + 162373.

It is an arithmetic number, because the mean of its divisors is an integer number (44458092).

Almost surely, 2^865219216 is an apocalyptic number.

It is an amenable number.

865219216 is an abundant number, since it is smaller than the sum of its proper divisors (913104464).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

865219216 is a wasteful number, since it uses less digits than its factorization.

865219216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6031 (or 6025 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 865219216 is about 29414.6088874219. The cubic root of 865219216 is about 952.8884263463. Note that the first 3 decimals are identical.

The spelling of 865219216 in words is "eight hundred sixty-five million, two hundred nineteen thousand, two hundred sixteen".