81982246 has 8 divisors (see below), whose sum is σ = 127213920. Its totient is φ = 39577608.

The previous prime is 81982237. The next prime is 81982249. The reversal of 81982246 is 64228918.

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 = 81982199 and 81982208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81982249) 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, 706686 + ... + 706801.

It is an arithmetic number, because the mean of its divisors is an integer number (15901740).

Almost surely, 2^81982246 is an apocalyptic number.

81982246 is a deficient number, since it is larger than the sum of its proper divisors (45231674).

81982246 is a wasteful number, since it uses less digits than its factorization.

81982246 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1413518.

The product of its digits is 55296, while the sum is 40.

The square root of 81982246 is about 9054.4047844129. The cubic root of 81982246 is about 434.4167918729.

It can be divided in two parts, 81982 and 246, that added together give a palindrome (82228).

The spelling of 81982246 in words is "eighty-one million, nine hundred eighty-two thousand, two hundred forty-six".