213540135 has 16 divisors (see below), whose sum is σ = 350899296. Its totient is φ = 110809728.

The previous prime is 213540133. The next prime is 213540143. The reversal of 213540135 is 531045312.

It is not a de Polignac number, because 213540135 - 2¹ = 213540133 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213540133) 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, 191824 + ... + 192933.

It is an arithmetic number, because the mean of its divisors is an integer number (21931206).

Almost surely, 2^213540135 is an apocalyptic number.

213540135 is a deficient number, since it is larger than the sum of its proper divisors (137359161).

213540135 is a wasteful number, since it uses less digits than its factorization.

213540135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384802.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 213540135 is about 14613.0125230905. The cubic root of 213540135 is about 597.7136459304.

Adding to 213540135 its reverse (531045312), we get a palindrome (744585447).

The spelling of 213540135 in words is "two hundred thirteen million, five hundred forty thousand, one hundred thirty-five".