213500135 has 16 divisors (see below), whose sum is σ = 258888000. Its totient is φ = 169019136.

The previous prime is 213500071. The next prime is 213500137. The reversal of 213500135 is 531005312.

213500135 = 178² + 179² + ... + 864².

It is a cyclic number.

It is not a de Polignac number, because 213500135 - 2⁶ = 213500071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213500137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 227387 + ... + 228323.

It is an arithmetic number, because the mean of its divisors is an integer number (16180500).

Almost surely, 2^213500135 is an apocalyptic number.

213500135 is a deficient number, since it is larger than the sum of its proper divisors (45387865).

213500135 is a wasteful number, since it uses less digits than its factorization.

213500135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1370.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 213500135 is about 14611.6438158066. The cubic root of 213500135 is about 597.6763226753.

Adding to 213500135 its reverse (531005312), we get a palindrome (744505447).

The spelling of 213500135 in words is "two hundred thirteen million, five hundred thousand, one hundred thirty-five".