82221971 has 8 divisors (see below), whose sum is σ = 88863600. Its totient is φ = 75625632.

The previous prime is 82221967. The next prime is 82221973. The reversal of 82221971 is 17912228.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 82221971 - 2² = 82221967 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82221973) 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, 7496 + ... + 14853.

It is an arithmetic number, because the mean of its divisors is an integer number (11107950).

Almost surely, 2^82221971 is an apocalyptic number.

82221971 is a deficient number, since it is larger than the sum of its proper divisors (6641629).

82221971 is a wasteful number, since it uses less digits than its factorization.

82221971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22645.

The product of its digits is 4032, while the sum is 32.

The square root of 82221971 is about 9067.6331531442. The cubic root of 82221971 is about 434.8398071353.

The spelling of 82221971 in words is "eighty-two million, two hundred twenty-one thousand, nine hundred seventy-one".