213085273 has 4 divisors (see below), whose sum is σ = 213689268. Its totient is φ = 212481280.

The previous prime is 213085231. The next prime is 213085283. The reversal of 213085273 is 372580312.

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 94536729 + 118548544 = 9723^2 + 10888^2 .

It is a cyclic number.

It is not a de Polignac number, because 213085273 - 2⁹ = 213084761 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (213085283) 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, 301468 + ... + 302173.

It is an arithmetic number, because the mean of its divisors is an integer number (53422317).

Almost surely, 2^213085273 is an apocalyptic number.

It is an amenable number.

213085273 is a deficient number, since it is larger than the sum of its proper divisors (603995).

213085273 is an equidigital number, since it uses as much as digits as its factorization.

213085273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603994.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 213085273 is about 14597.4406318368. The cubic root of 213085273 is about 597.2889474771.

The spelling of 213085273 in words is "two hundred thirteen million, eighty-five thousand, two hundred seventy-three".