213485 has 4 divisors (see below), whose sum is σ = 256188. Its totient is φ = 170784.

The previous prime is 213481. The next prime is 213491. The reversal of 213485 is 584312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 51076 + 162409 = 226^2 + 403^2 .

It is a cyclic number.

It is not a de Polignac number, because 213485 - 2² = 213481 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 213485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213481) 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, 21344 + ... + 21353.

It is an arithmetic number, because the mean of its divisors is an integer number (64047).

2²¹³⁴⁸⁵ is an apocalyptic number.

It is an amenable number.

213485 is a deficient number, since it is larger than the sum of its proper divisors (42703).

213485 is an equidigital number, since it uses as much as digits as its factorization.

213485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42702.

The product of its digits is 960, while the sum is 23.

The square root of 213485 is about 462.0443701637. The cubic root of 213485 is about 59.7662199273.

Adding to 213485 its reverse (584312), we get a palindrome (797797).

The spelling of 213485 in words is "two hundred thirteen thousand, four hundred eighty-five".