201318 has 32 divisors (see below), whose sum is σ = 453600. Its totient is φ = 59136.

The previous prime is 201307. The next prime is 201329. The reversal of 201318 is 813102.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (201307) and next prime (201329).

It is a junction number, because it is equal to n+sod(n) for n = 201297 and 201306.

It is a congruent number.

It is an unprimeable number.

201318 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2218 + ... + 2306.

It is an arithmetic number, because the mean of its divisors is an integer number (14175).

2²⁰¹³¹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226800).

201318 is an abundant number, since it is smaller than the sum of its proper divisors (252282).

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

201318 is a wasteful number, since it uses less digits than its factorization.

201318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 201318 is about 448.6847445590. The cubic root of 201318 is about 58.6085354510.

The spelling of 201318 in words is "two hundred one thousand, three hundred eighteen".