82221689 has 8 divisors (see below), whose sum is σ = 90535968. Its totient is φ = 74047360.

The previous prime is 82221653. The next prime is 82221701. The reversal of 82221689 is 98612228.

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 82221689 - 2¹⁶ = 82156153 is a prime.

It is a super-2 number, since 2×82221689² = 13520812284025442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82224689) 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, 33752 + ... + 36105.

It is an arithmetic number, because the mean of its divisors is an integer number (11316996).

Almost surely, 2^82221689 is an apocalyptic number.

It is an amenable number.

82221689 is a deficient number, since it is larger than the sum of its proper divisors (8314279).

82221689 is a wasteful number, since it uses less digits than its factorization.

82221689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69975.

The product of its digits is 27648, while the sum is 38.

The square root of 82221689 is about 9067.6176033179. The cubic root of 82221689 is about 434.8393100055.

The spelling of 82221689 in words is "eighty-two million, two hundred twenty-one thousand, six hundred eighty-nine".