82046221 has 4 divisors (see below), whose sum is σ = 85613472. Its totient is φ = 78478972.

The previous prime is 82046203. The next prime is 82046227. The reversal of 82046221 is 12264028.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 82046221 - 2⁷ = 82046093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82046227) 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, 1783591 + ... + 1783636.

It is an arithmetic number, because the mean of its divisors is an integer number (21403368).

Almost surely, 2^82046221 is an apocalyptic number.

It is an amenable number.

82046221 is a deficient number, since it is larger than the sum of its proper divisors (3567251).

82046221 is a wasteful number, since it uses less digits than its factorization.

82046221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3567250.

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 82046221 is about 9057.9369063822. The cubic root of 82046221 is about 434.5297618130.

The spelling of 82046221 in words is "eighty-two million, forty-six thousand, two hundred twenty-one".