201613 has 4 divisors (see below), whose sum is σ = 207100.
Its totient is φ = 196128.
The previous prime is 201611. The next prime is 201623. The reversal of 201613 is 316102.
Adding to 201613 its reverse (316102), we get a palindrome (517715).
It can be divided in two parts, 20161 and 3, that added together give a square (20164 = 1422).
201613 = 3172 + 3182.
201613 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a semiprime because it is the product of two primes.
It can be written as a sum of positive squares in 2 ways, for example, as 100489 + 101124 = 317^2 + 318^2
It is a cyclic number.
It is not a de Polignac number, because 201613 - 21 = 201611 is a prime.
It is a Duffinian number.
201613 is a lucky number.
It is a nialpdrome in base 12.
It is a junction number, because it is equal to n+sod(n) for n = 201593 and 201602.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (201611) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2688 + ... + 2761.
It is an arithmetic number, because the mean of its divisors is an integer number (51775).
2201613 is an apocalyptic number.
201613 is the 318-th centered square number.
It is an amenable number.
201613 is a deficient number, since it is larger than the sum of its proper divisors (5487).
201613 is an equidigital number, since it uses as much as digits as its factorization.
201613 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 5486.
The product of its (nonzero) digits is 36, while the sum is 13.
The square root of 201613 is about 449.0133628301.
The cubic root of 201613 is about 58.6371486894.
The spelling of 201613 in words is "two hundred one thousand, six hundred thirteen".