213506733 has 16 divisors (see below), whose sum is σ = 311121216. Its totient is φ = 129162240.

The previous prime is 213506717. The next prime is 213506747. The reversal of 213506733 is 337605312.

It is not a de Polignac number, because 213506733 - 2⁴ = 213506717 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213506733.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213506233) 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 15 ways as a sum of consecutive naturals, for example, 13435 + ... + 24647.

It is an arithmetic number, because the mean of its divisors is an integer number (19445076).

Almost surely, 2^213506733 is an apocalyptic number.

It is an amenable number.

213506733 is a deficient number, since it is larger than the sum of its proper divisors (97614483).

213506733 is a wasteful number, since it uses less digits than its factorization.

213506733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11804.

The product of its (nonzero) digits is 11340, while the sum is 30.

The square root of 213506733 is about 14611.8695929029. The cubic root of 213506733 is about 597.6824794672.

The spelling of 213506733 in words is "two hundred thirteen million, five hundred six thousand, seven hundred thirty-three".