81822435 has 8 divisors (see below), whose sum is σ = 130915920. Its totient is φ = 43638624.

The previous prime is 81822413. The next prime is 81822437. The reversal of 81822435 is 53422818.

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

It is not a de Polignac number, because 81822435 - 2²⁰ = 80773859 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 81822396 and 81822405.

It is not an unprimeable number, because it can be changed into a prime (81822437) 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 7 ways as a sum of consecutive naturals, for example, 2727400 + ... + 2727429.

It is an arithmetic number, because the mean of its divisors is an integer number (16364490).

Almost surely, 2^81822435 is an apocalyptic number.

81822435 is a deficient number, since it is larger than the sum of its proper divisors (49093485).

81822435 is a wasteful number, since it uses less digits than its factorization.

81822435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5454837.

The product of its digits is 15360, while the sum is 33.

The square root of 81822435 is about 9045.5754377486. The cubic root of 81822435 is about 434.1343333942.

The spelling of 81822435 in words is "eighty-one million, eight hundred twenty-two thousand, four hundred thirty-five".