81471682 has 8 divisors (see below), whose sum is σ = 122329152. Its totient is φ = 40695300.

The previous prime is 81471679. The next prime is 81471683. The reversal of 81471682 is 28617418.

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

It is not an unprimeable number, because it can be changed into a prime (81471683) 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, 17694 + ... + 21817.

It is an arithmetic number, because the mean of its divisors is an integer number (15291144).

Almost surely, 2^81471682 is an apocalyptic number.

81471682 is a deficient number, since it is larger than the sum of its proper divisors (40857470).

81471682 is a wasteful number, since it uses less digits than its factorization.

81471682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40544.

The product of its digits is 21504, while the sum is 37.

The square root of 81471682 is about 9026.1665174093. The cubic root of 81471682 is about 433.5131018755.

The spelling of 81471682 in words is "eighty-one million, four hundred seventy-one thousand, six hundred eighty-two".