82221474 has 64 divisors (see below), whose sum is σ = 180466560. Its totient is φ = 24883200.

The previous prime is 82221457. The next prime is 82221499. The reversal of 82221474 is 47412228.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 425922 + ... + 426114.

It is an arithmetic number, because the mean of its divisors is an integer number (2819790).

Almost surely, 2^82221474 is an apocalyptic number.

82221474 is an abundant number, since it is smaller than the sum of its proper divisors (98245086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

82221474 is a wasteful number, since it uses less digits than its factorization.

82221474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355.

The product of its digits is 7168, while the sum is 30.

The square root of 82221474 is about 9067.6057479359. The cubic root of 82221474 is about 434.8389309874.

The spelling of 82221474 in words is "eighty-two million, two hundred twenty-one thousand, four hundred seventy-four".