81683222 has 8 divisors (see below), whose sum is σ = 122600736. Its totient is φ = 40816312.

The previous prime is 81683219. The next prime is 81683237. The reversal of 81683222 is 22238618.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8318 + ... + 15249.

It is an arithmetic number, because the mean of its divisors is an integer number (15325092).

Almost surely, 2^81683222 is an apocalyptic number.

81683222 is a deficient number, since it is larger than the sum of its proper divisors (40917514).

81683222 is a wasteful number, since it uses less digits than its factorization.

81683222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25302.

The product of its digits is 9216, while the sum is 32.

The square root of 81683222 is about 9037.8770737381. The cubic root of 81683222 is about 433.8879810281.

The spelling of 81683222 in words is "eighty-one million, six hundred eighty-three thousand, two hundred twenty-two".