81622122 has 8 divisors (see below), whose sum is σ = 163244256. Its totient is φ = 27207372.

The previous prime is 81622109. The next prime is 81622129. The reversal of 81622122 is 22122618.

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

81622122 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 81622092 and 81622101.

It is not an unprimeable number, because it can be changed into a prime (81622129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6801838 + ... + 6801849.

It is an arithmetic number, because the mean of its divisors is an integer number (20405532).

Almost surely, 2^81622122 is an apocalyptic number.

81622122 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.

81622122 is a wasteful number, since it uses less digits than its factorization.

81622122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13603692.

The product of its digits is 768, while the sum is 24.

The square root of 81622122 is about 9034.4962228118. The cubic root of 81622122 is about 433.7797696239.

The spelling of 81622122 in words is "eighty-one million, six hundred twenty-two thousand, one hundred twenty-two".