181022 has 4 divisors (see below), whose sum is σ = 271536. Its totient is φ = 90510.

The previous prime is 181019. The next prime is 181031. The reversal of 181022 is 220181.

181022 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 220181 = 13 ⋅16937.

It is a junction number, because it is equal to n+sod(n) for n = 180988 and 181006.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45254 + ... + 45257.

It is an arithmetic number, because the mean of its divisors is an integer number (67884).

2¹⁸¹⁰²² is an apocalyptic number.

181022 is a deficient number, since it is larger than the sum of its proper divisors (90514).

181022 is an equidigital number, since it uses as much as digits as its factorization.

181022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90513.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 181022 is about 425.4668024652. The cubic root of 181022 is about 56.5688199953.

The spelling of 181022 in words is "one hundred eighty-one thousand, twenty-two".