81443022 has 16 divisors (see below), whose sum is σ = 172467792. Its totient is φ = 25550720.

The previous prime is 81443009. The next prime is 81443029. The reversal of 81443022 is 22034418.

It is a junction number, because it is equal to n+sod(n) for n = 81442983 and 81443001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81443029) 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, 399129 + ... + 399332.

It is an arithmetic number, because the mean of its divisors is an integer number (10779237).

Almost surely, 2^81443022 is an apocalyptic number.

81443022 is an abundant number, since it is smaller than the sum of its proper divisors (91024770).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81443022 is a wasteful number, since it uses less digits than its factorization.

81443022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 798483.

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 81443022 is about 9024.5787713333. The cubic root of 81443022 is about 433.4622623593.

The spelling of 81443022 in words is "eighty-one million, four hundred forty-three thousand, twenty-two".