81322026 has 8 divisors (see below), whose sum is σ = 162644064. Its totient is φ = 27107340.

The previous prime is 81322019. The next prime is 81322057. The reversal of 81322026 is 62022318.

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

81322026 is an admirable number.

It is a super-2 number, since 2×81322026² = 13226543825489352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 81321987 and 81322005.

It is an unprimeable number.

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, 6776830 + ... + 6776841.

It is an arithmetic number, because the mean of its divisors is an integer number (20330508).

Almost surely, 2^81322026 is an apocalyptic number.

81322026 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81322026 is a wasteful number, since it uses less digits than its factorization.

81322026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13553676.

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 81322026 is about 9017.8725872569. The cubic root of 81322026 is about 433.2474979231.

The spelling of 81322026 in words is "eighty-one million, three hundred twenty-two thousand, twenty-six".