213336 has 24 divisors (see below), whose sum is σ = 577980. Its totient is φ = 71088.

The previous prime is 213329. The next prime is 213337. The reversal of 213336 is 633312.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213337) by changing a digit.

213336 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 5 ways as a sum of consecutive naturals, for example, 1410 + ... + 1553.

2²¹³³³⁶ is an apocalyptic number.

It is an amenable number.

213336 is an abundant number, since it is smaller than the sum of its proper divisors (364644).

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

213336 is a wasteful number, since it uses less digits than its factorization.

213336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2975 (or 2968 counting only the distinct ones).

The product of its digits is 324, while the sum is 18.

The square root of 213336 is about 461.8831020940. The cubic root of 213336 is about 59.7523122533.

Adding to 213336 its reverse (633312), we get a palindrome (846648).

The spelling of 213336 in words is "two hundred thirteen thousand, three hundred thirty-six".