213435213253 has 4 divisors (see below), whose sum is σ = 213498494188. Its totient is φ = 213371932320.

The previous prime is 213435213221. The next prime is 213435213259. The reversal of 213435213253 is 352312534312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 119592855684 + 93842357569 = 345822^2 + 306337^2 .

It is a cyclic number.

It is not a de Polignac number, because 213435213253 - 2⁵ = 213435213221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213435213259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31635408 + ... + 31642153.

It is an arithmetic number, because the mean of its divisors is an integer number (53374623547).

Almost surely, 2^213435213253 is an apocalyptic number.

It is an amenable number.

213435213253 is a deficient number, since it is larger than the sum of its proper divisors (63280935).

213435213253 is an equidigital number, since it uses as much as digits as its factorization.

213435213253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63280934.

The product of its digits is 64800, while the sum is 34.

Adding to 213435213253 its reverse (352312534312), we get a palindrome (565747747565).

The spelling of 213435213253 in words is "two hundred thirteen billion, four hundred thirty-five million, two hundred thirteen thousand, two hundred fifty-three".