213335431 has 4 divisors (see below), whose sum is σ = 225884592. Its totient is φ = 200786272.

The previous prime is 213335417. The next prime is 213335453. The reversal of 213335431 is 134533312.

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

It is a cyclic number.

It is not a de Polignac number, because 213335431 - 2¹⁷ = 213204359 is a prime.

It is a super-2 number, since 2×213335431² = 91024012239911522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213335396 and 213335405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213335411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6274555 + ... + 6274588.

It is an arithmetic number, because the mean of its divisors is an integer number (56471148).

Almost surely, 2^213335431 is an apocalyptic number.

213335431 is a deficient number, since it is larger than the sum of its proper divisors (12549161).

213335431 is a wasteful number, since it uses less digits than its factorization.

213335431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12549160.

The product of its digits is 3240, while the sum is 25.

The square root of 213335431 is about 14606.0066753374. The cubic root of 213335431 is about 597.5225913040.

Adding to 213335431 its reverse (134533312), we get a palindrome (347868743).

The spelling of 213335431 in words is "two hundred thirteen million, three hundred thirty-five thousand, four hundred thirty-one".