181313 has 8 divisors (see below), whose sum is σ = 202176. Its totient is φ = 161200.

The previous prime is 181303. The next prime is 181361. The reversal of 181313 is 313181.

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 181313 - 2⁴ = 181297 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 181291 and 181300.

It is not an unprimeable number, because it can be changed into a prime (181303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 428 + ... + 738.

It is an arithmetic number, because the mean of its divisors is an integer number (25272).

2¹⁸¹³¹³ is an apocalyptic number.

It is an amenable number.

181313 is a deficient number, since it is larger than the sum of its proper divisors (20863).

181313 is a wasteful number, since it uses less digits than its factorization.

181313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375.

The product of its digits is 72, while the sum is 17.

The square root of 181313 is about 425.8086424675. The cubic root of 181313 is about 56.5991159697.

Adding to 181313 its reverse (313181), we get a palindrome (494494).

It can be divided in two parts, 181 and 313, that added together give a palindrome (494).

The spelling of 181313 in words is "one hundred eighty-one thousand, three hundred thirteen".