213546 has 8 divisors (see below), whose sum is σ = 427104. Its totient is φ = 71180.

The previous prime is 213539. The next prime is 213553. The reversal of 213546 is 645312.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (213539) and next prime (213553).

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

213546 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 213546.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 17790 + ... + 17801.

It is an arithmetic number, because the mean of its divisors is an integer number (53388).

2²¹³⁵⁴⁶ is an apocalyptic number.

213546 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213546 is a wasteful number, since it uses less digits than its factorization.

213546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35596.

The product of its digits is 720, while the sum is 21.

The square root of 213546 is about 462.1103764254. The cubic root of 213546 is about 59.7719118061.

Adding to 213546 its reverse (645312), we get a palindrome (858858).

The spelling of 213546 in words is "two hundred thirteen thousand, five hundred forty-six".