81429182 has 8 divisors (see below), whose sum is σ = 122243256. Its totient is φ = 40681432.

The previous prime is 81429181. The next prime is 81429191. The reversal of 81429182 is 28192418.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81429181) 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, 13388 + ... + 18495.

It is an arithmetic number, because the mean of its divisors is an integer number (15280407).

Almost surely, 2^81429182 is an apocalyptic number.

81429182 is a deficient number, since it is larger than the sum of its proper divisors (40814074).

81429182 is a wasteful number, since it uses less digits than its factorization.

81429182 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33162.

The product of its digits is 9216, while the sum is 35.

The square root of 81429182 is about 9023.8119439625. The cubic root of 81429182 is about 433.4377075339.

The spelling of 81429182 in words is "eighty-one million, four hundred twenty-nine thousand, one hundred eighty-two".