81922835 has 8 divisors (see below), whose sum is σ = 98442816. Its totient is φ = 65448000.

The previous prime is 81922829. The next prime is 81922837. The reversal of 81922835 is 53822918.

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

It is not a de Polignac number, because 81922835 - 2²² = 77728531 is a prime.

It is a super-2 number, since 2×81922835² = 13422701788874450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (81922837) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7154 + ... + 14663.

It is an arithmetic number, because the mean of its divisors is an integer number (12305352).

Almost surely, 2^81922835 is an apocalyptic number.

81922835 is a deficient number, since it is larger than the sum of its proper divisors (16519981).

81922835 is a wasteful number, since it uses less digits than its factorization.

81922835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22573.

The product of its digits is 34560, while the sum is 38.

The square root of 81922835 is about 9051.1234109363. The cubic root of 81922835 is about 434.3118286065.

The spelling of 81922835 in words is "eighty-one million, nine hundred twenty-two thousand, eight hundred thirty-five".