81243182 has 8 divisors (see below), whose sum is σ = 121905336. Its totient is φ = 40608072.

The previous prime is 81243179. The next prime is 81243191. The reversal of 81243182 is 28134218.

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

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, 4508 + ... + 13520.

It is an arithmetic number, because the mean of its divisors is an integer number (15238167).

Almost surely, 2^81243182 is an apocalyptic number.

It is a pronic number, being equal to 9013×9014.

81243182 is a deficient number, since it is larger than the sum of its proper divisors (40662154).

81243182 is a wasteful number, since it uses less digits than its factorization.

81243182 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13522.

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

The square root of 81243182 is about 9013.4999861319. The cubic root of 81243182 is about 433.1074374224.

The spelling of 81243182 in words is "eighty-one million, two hundred forty-three thousand, one hundred eighty-two".