213330531 has 8 divisors (see below), whose sum is σ = 284536000. Its totient is φ = 142172712.

The previous prime is 213330527. The next prime is 213330581. The reversal of 213330531 is 135033312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213330531 - 2² = 213330527 is a prime.

It is a super-3 number, since 3×213330531³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213330498 and 213330507.

It is not an unprimeable number, because it can be changed into a prime (213330521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336 + ... + 20658.

It is an arithmetic number, because the mean of its divisors is an integer number (35567000).

Almost surely, 2^213330531 is an apocalyptic number.

213330531 is a deficient number, since it is larger than the sum of its proper divisors (71205469).

213330531 is a wasteful number, since it uses less digits than its factorization.

213330531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23825.

The product of its (nonzero) digits is 810, while the sum is 21.

The square root of 213330531 is about 14605.8389351656. The cubic root of 213330531 is about 597.5180165316.

Adding to 213330531 its reverse (135033312), we get a palindrome (348363843).

The spelling of 213330531 in words is "two hundred thirteen million, three hundred thirty thousand, five hundred thirty-one".