82212919 has 2 divisors, whose sum is σ = 82212920. Its totient is φ = 82212918.

The previous prime is 82212881. The next prime is 82212967. The reversal of 82212919 is 91921228.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 82212919 - 2⁹ = 82212407 is a prime.

It is a super-2 number, since 2×82212919² = 13517928101001122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (82212979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41106459 + 41106460.

It is an arithmetic number, because the mean of its divisors is an integer number (41106460).

Almost surely, 2^82212919 is an apocalyptic number.

82212919 is a deficient number, since it is larger than the sum of its proper divisors (1).

82212919 is an equidigital number, since it uses as much as digits as its factorization.

82212919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 34.

The square root of 82212919 is about 9067.1340014362. The cubic root of 82212919 is about 434.8238490552.

The spelling of 82212919 in words is "eighty-two million, two hundred twelve thousand, nine hundred nineteen".