81472582 has 8 divisors (see below), whose sum is σ = 123351336. Its totient is φ = 40355472.

The previous prime is 81472561. The next prime is 81472597. The reversal of 81472582 is 28527418.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 190143 + ... + 190570.

It is an arithmetic number, because the mean of its divisors is an integer number (15418917).

Almost surely, 2^81472582 is an apocalyptic number.

81472582 is a deficient number, since it is larger than the sum of its proper divisors (41878754).

81472582 is a wasteful number, since it uses less digits than its factorization.

81472582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380822.

The product of its digits is 35840, while the sum is 37.

The square root of 81472582 is about 9026.2163723235. The cubic root of 81472582 is about 433.5146981780.

The spelling of 81472582 in words is "eighty-one million, four hundred seventy-two thousand, five hundred eighty-two".