82447321 has 8 divisors (see below), whose sum is σ = 92844288. Its totient is φ = 72534000.

The previous prime is 82447307. The next prime is 82447333. The reversal of 82447321 is 12374428.

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

It is not a de Polignac number, because 82447321 - 2⁹ = 82446809 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82447301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120550 + ... + 121231.

It is an arithmetic number, because the mean of its divisors is an integer number (11605536).

Almost surely, 2^82447321 is an apocalyptic number.

It is an amenable number.

82447321 is a deficient number, since it is larger than the sum of its proper divisors (10396967).

82447321 is a wasteful number, since it uses less digits than its factorization.

82447321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241823.

The product of its digits is 10752, while the sum is 31.

The square root of 82447321 is about 9080.0507157174. The cubic root of 82447321 is about 435.2367073891.

The spelling of 82447321 in words is "eighty-two million, four hundred forty-seven thousand, three hundred twenty-one".