213404135 has 8 divisors (see below), whose sum is σ = 292668576. Its totient is φ = 146334240.

The previous prime is 213404131. The next prime is 213404161. The reversal of 213404135 is 531404312.

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

It is not a de Polignac number, because 213404135 - 2² = 213404131 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 213404135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213404131) 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, 3048596 + ... + 3048665.

It is an arithmetic number, because the mean of its divisors is an integer number (36583572).

Almost surely, 2^213404135 is an apocalyptic number.

213404135 is a deficient number, since it is larger than the sum of its proper divisors (79264441).

213404135 is an equidigital number, since it uses as much as digits as its factorization.

213404135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6097273.

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

The square root of 213404135 is about 14608.3583951107. The cubic root of 213404135 is about 597.5867278390.

Adding to 213404135 its reverse (531404312), we get a palindrome (744808447).

The spelling of 213404135 in words is "two hundred thirteen million, four hundred four thousand, one hundred thirty-five".