213204533 has 4 divisors (see below), whose sum is σ = 213334860. Its totient is φ = 213074208.

The previous prime is 213204499. The next prime is 213204539. The reversal of 213204533 is 335402312.

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 22819729 + 190384804 = 4777^2 + 13798^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-213204533 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213204499 and 213204508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213204539) 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, 62678 + ... + 65991.

It is an arithmetic number, because the mean of its divisors is an integer number (53333715).

Almost surely, 2^213204533 is an apocalyptic number.

It is an amenable number.

213204533 is a deficient number, since it is larger than the sum of its proper divisors (130327).

213204533 is a wasteful number, since it uses less digits than its factorization.

213204533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130326.

The product of its (nonzero) digits is 2160, while the sum is 23.

The square root of 213204533 is about 14601.5250230926. The cubic root of 213204533 is about 597.4003573269.

Adding to 213204533 its reverse (335402312), we get a palindrome (548606845).

The spelling of 213204533 in words is "two hundred thirteen million, two hundred four thousand, five hundred thirty-three".