215930 has 32 divisors (see below), whose sum is σ = 459648. Its totient is φ = 72000.

The previous prime is 215927. The next prime is 215939. The reversal of 215930 is 39512.

It is a Smith number, since the sum of its digits (20) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a cake number, because a cake can be divided into 215930 parts by 109 planar cuts.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215939) 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 15 ways as a sum of consecutive naturals, for example, 1355 + ... + 1505.

It is an arithmetic number, because the mean of its divisors is an integer number (14364).

2²¹⁵⁹³⁰ is an apocalyptic number.

215930 is an abundant number, since it is smaller than the sum of its proper divisors (243718).

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

215930 is a wasteful number, since it uses less digits than its factorization.

215930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 215930 is about 464.6826874330. The cubic root of 215930 is about 59.9935178182.

The spelling of 215930 in words is "two hundred fifteen thousand, nine hundred thirty".