213008533 has 6 divisors (see below), whose sum is σ = 220102422. Its totient is φ = 206136360.

The previous prime is 213008531. The next prime is 213008557. The reversal of 213008533 is 335800312.

It can be written as a sum of positive squares in only one way, i.e., 136585969 + 76422564 = 11687^2 + 8742^2 .

It is not a de Polignac number, because 213008533 - 2¹ = 213008531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213008498 and 213008507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213008531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109866 + ... + 111787.

It is an arithmetic number, because the mean of its divisors is an integer number (36683737).

Almost surely, 2^213008533 is an apocalyptic number.

It is an amenable number.

213008533 is a deficient number, since it is larger than the sum of its proper divisors (7093889).

213008533 is an equidigital number, since it uses as much as digits as its factorization.

213008533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221715 (or 221684 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 213008533 is about 14594.8118521617. The cubic root of 213008533 is about 597.2172368161.

Adding to 213008533 its reverse (335800312), we get a palindrome (548808845).

The spelling of 213008533 in words is "two hundred thirteen million, eight thousand, five hundred thirty-three".