181013 has 8 divisors (see below), whose sum is σ = 217920. Its totient is φ = 146880.

The previous prime is 181003. The next prime is 181019. The reversal of 181013 is 310181.

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 181013 - 2⁶ = 180949 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181019) 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, 548 + ... + 813.

It is an arithmetic number, because the mean of its divisors is an integer number (27240).

2¹⁸¹⁰¹³ is an apocalyptic number.

It is an amenable number.

181013 is a deficient number, since it is larger than the sum of its proper divisors (36907).

181013 is a wasteful number, since it uses less digits than its factorization.

181013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387.

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 181013 is about 425.4562257154. The cubic root of 181013 is about 56.5678824889.

Adding to 181013 its reverse (310181), we get a palindrome (491194).

The spelling of 181013 in words is "one hundred eighty-one thousand, thirteen".