285019213 has 8 divisors (see below), whose sum is σ = 292255128. Its totient is φ = 277852224.

The previous prime is 285019201. The next prime is 285019223. The reversal of 285019213 is 312910582.

It can be written as a sum of positive squares in 4 ways, for example, as 15468489 + 269550724 = 3933^2 + 16418^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 285019213 - 2²¹ = 282922061 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 (285019223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8806 + ... + 25447.

It is an arithmetic number, because the mean of its divisors is an integer number (36531891).

Almost surely, 2^285019213 is an apocalyptic number.

It is an amenable number.

285019213 is a deficient number, since it is larger than the sum of its proper divisors (7235915).

285019213 is a wasteful number, since it uses less digits than its factorization.

285019213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34463.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 285019213 is about 16882.5120464936. The cubic root of 285019213 is about 658.0992242343.

Adding to 285019213 its reverse (312910582), we get a palindrome (597929795).

The spelling of 285019213 in words is "two hundred eighty-five million, nineteen thousand, two hundred thirteen".