213039285 has 24 divisors (see below), whose sum is σ = 352236960. Its totient is φ = 109948320.

The previous prime is 213039283. The next prime is 213039289. The reversal of 213039285 is 582930312.

It is not a de Polignac number, because 213039285 - 2¹ = 213039283 is a prime.

It is a super-2 number, since 2×213039285² = 90771473906622450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213039283) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7026 + ... + 21804.

It is an arithmetic number, because the mean of its divisors is an integer number (14676540).

Almost surely, 2^213039285 is an apocalyptic number.

It is an amenable number.

213039285 is a deficient number, since it is larger than the sum of its proper divisors (139197675).

213039285 is a wasteful number, since it uses less digits than its factorization.

213039285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14849 (or 14818 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 213039285 is about 14595.8653391979. The cubic root of 213039285 is about 597.2459754781.

Adding to 213039285 its reverse (582930312), we get a palindrome (795969597).

The spelling of 213039285 in words is "two hundred thirteen million, thirty-nine thousand, two hundred eighty-five".