82226779 has 4 divisors (see below), whose sum is σ = 82265560. Its totient is φ = 82188000.

The previous prime is 82226777. The next prime is 82226783. The reversal of 82226779 is 97762228.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 82226779 - 2¹ = 82226777 is a prime.

It is a super-2 number, since 2×82226779² = 13522486369429682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82226777) 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, 16014 + ... + 20515.

It is an arithmetic number, because the mean of its divisors is an integer number (20566390).

Almost surely, 2^82226779 is an apocalyptic number.

82226779 is a deficient number, since it is larger than the sum of its proper divisors (38781).

82226779 is a wasteful number, since it uses less digits than its factorization.

82226779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38780.

The product of its digits is 169344, while the sum is 43.

The square root of 82226779 is about 9067.8982680663. The cubic root of 82226779 is about 434.8482828465.

The spelling of 82226779 in words is "eighty-two million, two hundred twenty-six thousand, seven hundred seventy-nine".