213242135 has 16 divisors (see below), whose sum is σ = 271454976. Its totient is φ = 160255488.

The previous prime is 213242129. The next prime is 213242143. The reversal of 213242135 is 531242312.

It is a cyclic number.

It is not a de Polignac number, because 213242135 - 2⁸ = 213241879 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213242135.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49529 + ... + 53661.

It is an arithmetic number, because the mean of its divisors is an integer number (16965936).

Almost surely, 2^213242135 is an apocalyptic number.

213242135 is a deficient number, since it is larger than the sum of its proper divisors (58212841).

213242135 is a wasteful number, since it uses less digits than its factorization.

213242135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4762.

The product of its digits is 1440, while the sum is 23.

The square root of 213242135 is about 14602.8125715562. The cubic root of 213242135 is about 597.4354756043.

Adding to 213242135 its reverse (531242312), we get a palindrome (744484447).

The spelling of 213242135 in words is "two hundred thirteen million, two hundred forty-two thousand, one hundred thirty-five".