81601282 has 8 divisors (see below), whose sum is σ = 139887936. Its totient is φ = 34971972.

The previous prime is 81601277. The next prime is 81601283. The reversal of 81601282 is 28210618.

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

It is a self number, because there is not a number n which added to its sum of digits gives 81601282.

It is not an unprimeable number, because it can be changed into a prime (81601283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2914318 + ... + 2914345.

It is an arithmetic number, because the mean of its divisors is an integer number (17485992).

Almost surely, 2^81601282 is an apocalyptic number.

81601282 is a deficient number, since it is larger than the sum of its proper divisors (58286654).

81601282 is a wasteful number, since it uses less digits than its factorization.

81601282 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5828672.

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 81601282 is about 9033.3427921230. The cubic root of 81601282 is about 433.7428485064.

The spelling of 81601282 in words is "eighty-one million, six hundred one thousand, two hundred eighty-two".