213601 has 8 divisors (see below), whose sum is σ = 229824. Its totient is φ = 198000.
The previous prime is 213599. The next prime is 213611. The reversal of 213601 is 106312.
It is a sphenic number, since it is the product of 3 distinct primes.
It is a cyclic number.
It is not a de Polignac number, because 213601 - 21 = 213599 is a prime.
It is a Duffinian number.
It is not an unprimeable number, because it can be changed into a prime (213611) 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, 726 + ... + 976.
It is an arithmetic number, because the mean of its divisors is an integer number (28728).
2213601 is an apocalyptic number.
It is an amenable number.
213601 is a deficient number, since it is larger than the sum of its proper divisors (16223).
213601 is a wasteful number, since it uses less digits than its factorization.
213601 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 311.
The product of its (nonzero) digits is 36, while the sum is 13.
The square root of 213601 is about 462.1698821862. The cubic root of 213601 is about 59.7770428988. Note that the first 3 decimals are identical.
Adding to 213601 its reverse (106312), we get a palindrome (319913).
The spelling of 213601 in words is "two hundred thirteen thousand, six hundred one".
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