82721226 has 32 divisors (see below), whose sum is σ = 189504000. Its totient is φ = 23581296.

The previous prime is 82721141. The next prime is 82721227. The reversal of 82721226 is 62212728.

It is a junction number, because it is equal to n+sod(n) for n = 82721193 and 82721202.

It is not an unprimeable number, because it can be changed into a prime (82721227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18985 + ... + 22931.

It is an arithmetic number, because the mean of its divisors is an integer number (5922000).

Almost surely, 2^82721226 is an apocalyptic number.

82721226 is an abundant number, since it is smaller than the sum of its proper divisors (106782774).

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

82721226 is a wasteful number, since it uses less digits than its factorization.

82721226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4458.

The product of its digits is 5376, while the sum is 30.

The square root of 82721226 is about 9095.1209997449. The cubic root of 82721226 is about 435.7181531401.

The spelling of 82721226 in words is "eighty-two million, seven hundred twenty-one thousand, two hundred twenty-six".