215559 has 12 divisors (see below), whose sum is σ = 319176. Its totient is φ = 140112.

The previous prime is 215531. The next prime is 215563. The reversal of 215559 is 955512.

It is not a de Polignac number, because 215559 - 2¹³ = 207367 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is an Ulam number.

215559 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215359) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 109 + ... + 665.

It is an arithmetic number, because the mean of its divisors is an integer number (26598).

2²¹⁵⁵⁵⁹ is an apocalyptic number.

215559 is a deficient number, since it is larger than the sum of its proper divisors (103617).

215559 is a wasteful number, since it uses less digits than its factorization.

215559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606 (or 603 counting only the distinct ones).

The product of its digits is 2250, while the sum is 27.

The square root of 215559 is about 464.2833186751. The cubic root of 215559 is about 59.9591388458.

The spelling of 215559 in words is "two hundred fifteen thousand, five hundred fifty-nine".