213530 has 16 divisors (see below), whose sum is σ = 389664. Its totient is φ = 84240.

The previous prime is 213523. The next prime is 213533. The reversal of 213530 is 35312.

It is not an unprimeable number, because it can be changed into a prime (213533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1229 + ... + 1391.

It is an arithmetic number, because the mean of its divisors is an integer number (24354).

2²¹³⁵³⁰ is an apocalyptic number.

213530 is a deficient number, since it is larger than the sum of its proper divisors (176134).

213530 is a wasteful number, since it uses less digits than its factorization.

213530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301.

The product of its (nonzero) digits is 90, while the sum is 14.

The square root of 213530 is about 462.0930642198. The cubic root of 213530 is about 59.7704189592.

Adding to 213530 its reverse (35312), we get a palindrome (248842).

The spelling of 213530 in words is "two hundred thirteen thousand, five hundred thirty".