181023 has 8 divisors (see below), whose sum is σ = 244608. Its totient is φ = 119064.

The previous prime is 181019. The next prime is 181031. The reversal of 181023 is 320181.

It is a happy number.

181023 is nontrivially palindromic in base 15.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 181023 - 2² = 181019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 180993 and 181011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (181003) 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, 115 + ... + 612.

It is an arithmetic number, because the mean of its divisors is an integer number (30576).

2¹⁸¹⁰²³ is an apocalyptic number.

181023 is a deficient number, since it is larger than the sum of its proper divisors (63585).

181023 is an equidigital number, since it uses as much as digits as its factorization.

181023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 813.

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

The square root of 181023 is about 425.4679776434. The cubic root of 181023 is about 56.5689241607.

The spelling of 181023 in words is "one hundred eighty-one thousand, twenty-three".