213543133 has 4 divisors (see below), whose sum is σ = 215101980. Its totient is φ = 211984288.

The previous prime is 213543101. The next prime is 213543149. The reversal of 213543133 is 331345312.

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 126270169 + 87272964 = 11237^2 + 9342^2 .

It is a cyclic number.

It is not a de Polignac number, because 213543133 - 2⁵ = 213543101 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213543098 and 213543107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213543233) 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, 779218 + ... + 779491.

It is an arithmetic number, because the mean of its divisors is an integer number (53775495).

Almost surely, 2^213543133 is an apocalyptic number.

It is an amenable number.

213543133 is a deficient number, since it is larger than the sum of its proper divisors (1558847).

213543133 is a wasteful number, since it uses less digits than its factorization.

213543133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558846.

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

The square root of 213543133 is about 14613.1151025372. The cubic root of 213543133 is about 597.7164431206.

Adding to 213543133 its reverse (331345312), we get a palindrome (544888445).

The spelling of 213543133 in words is "two hundred thirteen million, five hundred forty-three thousand, one hundred thirty-three".