213586 has 8 divisors (see below), whose sum is σ = 322380. Its totient is φ = 106128.

The previous prime is 213557. The next prime is 213589. The reversal of 213586 is 685312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 207025 + 6561 = 455^2 + 81^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 213586.

It is not an unprimeable number, because it can be changed into a prime (213589) by changing a digit.

213586 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340 + ... + 736.

2²¹³⁵⁸⁶ is an apocalyptic number.

213586 is a deficient number, since it is larger than the sum of its proper divisors (108794).

213586 is a wasteful number, since it uses less digits than its factorization.

213586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 668.

The product of its digits is 1440, while the sum is 25.

The square root of 213586 is about 462.1536541022. The cubic root of 213586 is about 59.7756435972.

Adding to 213586 its reverse (685312), we get a palindrome (898898).

It can be divided in two parts, 2 and 13586, that multiplied together give a palindrome (27172).

The spelling of 213586 in words is "two hundred thirteen thousand, five hundred eighty-six".