215965696 has 56 divisors (see below), whose sum is σ = 443127384. Its totient is φ = 105185280.

The previous prime is 215965693. The next prime is 215965727. The reversal of 215965696 is 696569512.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215965691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 335551 + ... + 336193.

It is an arithmetic number, because the mean of its divisors is an integer number (7912989).

Almost surely, 2^215965696 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 215965696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221563692).

215965696 is an abundant number, since it is smaller than the sum of its proper divisors (227161688).

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

215965696 is an frugal number, since it uses more digits than its factorization.

215965696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710 (or 686 counting only the distinct ones).

The product of its digits is 874800, while the sum is 49.

The square root of 215965696 is about 14695.7713645797. The cubic root of 215965696 is about 599.9682353554.

The spelling of 215965696 in words is "two hundred fifteen million, nine hundred sixty-five thousand, six hundred ninety-six".