215916 has 24 divisors (see below), whose sum is σ = 530880. Its totient is φ = 68112.

The previous prime is 215909. The next prime is 215921. The reversal of 215916 is 619512.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 215916.

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, 246 + ... + 701.

It is an arithmetic number, because the mean of its divisors is an integer number (22120).

2²¹⁵⁹¹⁶ is an apocalyptic number.

It is an amenable number.

215916 is an abundant number, since it is smaller than the sum of its proper divisors (314964).

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

215916 is a wasteful number, since it uses less digits than its factorization.

215916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973 (or 971 counting only the distinct ones).

The product of its digits is 540, while the sum is 24.

The square root of 215916 is about 464.6676231458. The cubic root of 215916 is about 59.9922212138.

The spelling of 215916 in words is "two hundred fifteen thousand, nine hundred sixteen".