81422806 has 8 divisors (see below), whose sum is σ = 127444464. Its totient is φ = 38941320.

The previous prime is 81422801. The next prime is 81422819. The reversal of 81422806 is 60822418.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81422801) 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, 884985 + ... + 885076.

It is an arithmetic number, because the mean of its divisors is an integer number (15930558).

Almost surely, 2^81422806 is an apocalyptic number.

81422806 is a deficient number, since it is larger than the sum of its proper divisors (46021658).

81422806 is a wasteful number, since it uses less digits than its factorization.

81422806 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1770086.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 81422806 is about 9023.4586495423. The cubic root of 81422806 is about 433.4263943458.

It can be divided in two parts, 81422 and 806, that added together give a palindrome (82228).

The spelling of 81422806 in words is "eighty-one million, four hundred twenty-two thousand, eight hundred six".