81022 has 8 divisors (see below), whose sum is σ = 128736. Its totient is φ = 38112.

The previous prime is 81019. The next prime is 81023. The reversal of 81022 is 22018.

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

It is a junction number, because it is equal to n+sod(n) for n = 80993 and 81011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1158 + ... + 1225.

It is an arithmetic number, because the mean of its divisors is an integer number (16092).

2⁸¹⁰²² is an apocalyptic number.

81022 is a deficient number, since it is larger than the sum of its proper divisors (47714).

81022 is a wasteful number, since it uses less digits than its factorization.

81022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2402.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 81022 is about 284.6436368514. The cubic root of 81022 is about 43.2714039757.

The spelling of 81022 in words is "eighty-one thousand, twenty-two".