82505219 has 2 divisors, whose sum is σ = 82505220. Its totient is φ = 82505218.

The previous prime is 82505197. The next prime is 82505231. The reversal of 82505219 is 91250528.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 82505219 - 2⁸ = 82504963 is a prime.

It is a super-2 number, since 2×82505219² = 13614222324475922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (82505249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41252609 + 41252610.

It is an arithmetic number, because the mean of its divisors is an integer number (41252610).

Almost surely, 2^82505219 is an apocalyptic number.

82505219 is a deficient number, since it is larger than the sum of its proper divisors (1).

82505219 is an equidigital number, since it uses as much as digits as its factorization.

82505219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 82505219 is about 9083.2383542435. The cubic root of 82505219 is about 435.3385640987.

The spelling of 82505219 in words is "eighty-two million, five hundred five thousand, two hundred nineteen".