81700022 has 8 divisors (see below), whose sum is σ = 122676672. Its totient is φ = 40807800.

The previous prime is 81700009. The next prime is 81700039. The reversal of 81700022 is 22000718.

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

It is a junction number, because it is equal to n+sod(n) for n = 81699967 and 81700003.

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, 18629 + ... + 22592.

It is an arithmetic number, because the mean of its divisors is an integer number (15334584).

Almost surely, 2^81700022 is an apocalyptic number.

81700022 is a deficient number, since it is larger than the sum of its proper divisors (40976650).

81700022 is a wasteful number, since it uses less digits than its factorization.

81700022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42214.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 81700022 is about 9038.8064477563. The cubic root of 81700022 is about 433.9177252776.

The spelling of 81700022 in words is "eighty-one million, seven hundred thousand, twenty-two".