285230213 has 4 divisors (see below), whose sum is σ = 285381228. Its totient is φ = 285079200.

The previous prime is 285230203. The next prime is 285230237. The reversal of 285230213 is 312032582.

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 215707969 + 69522244 = 14687^2 + 8338^2 .

It is a cyclic number.

It is not a de Polignac number, because 285230213 - 2²⁰ = 284181637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285230203) by changing a digit.

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, 72638 + ... + 76463.

It is an arithmetic number, because the mean of its divisors is an integer number (71345307).

Almost surely, 2^285230213 is an apocalyptic number.

It is an amenable number.

285230213 is a deficient number, since it is larger than the sum of its proper divisors (151015).

285230213 is a wasteful number, since it uses less digits than its factorization.

285230213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151014.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 285230213 is about 16888.7599603997. The cubic root of 285230213 is about 658.2615813413.

Adding to 285230213 its reverse (312032582), we get a palindrome (597262795).

The spelling of 285230213 in words is "two hundred eighty-five million, two hundred thirty thousand, two hundred thirteen".