215958 has 8 divisors (see below), whose sum is σ = 431928. Its totient is φ = 71984.

The previous prime is 215953. The next prime is 215959. The reversal of 215958 is 859512.

215958 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

215958 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 215958.

It is not an unprimeable number, because it can be changed into a prime (215953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17991 + ... + 18002.

It is an arithmetic number, because the mean of its divisors is an integer number (53991).

2²¹⁵⁹⁵⁸ is an apocalyptic number.

215958 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

215958 is a wasteful number, since it uses less digits than its factorization.

215958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35998.

The product of its digits is 3600, while the sum is 30.

The square root of 215958 is about 464.7128145425. The cubic root of 215958 is about 59.9961108590.

The spelling of 215958 in words is "two hundred fifteen thousand, nine hundred fifty-eight".