81682022 has 4 divisors (see below), whose sum is σ = 122523036. Its totient is φ = 40841010.

The previous prime is 81681961. The next prime is 81682031. The reversal of 81682022 is 22028618.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20420504 + ... + 20420507.

It is an arithmetic number, because the mean of its divisors is an integer number (30630759).

Almost surely, 2^81682022 is an apocalyptic number.

81682022 is a deficient number, since it is larger than the sum of its proper divisors (40841014).

81682022 is a wasteful number, since it uses less digits than its factorization.

81682022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40841013.

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 81682022 is about 9037.8106862226. The cubic root of 81682022 is about 433.8858562828.

The spelling of 81682022 in words is "eighty-one million, six hundred eighty-two thousand, twenty-two".