82505511 has 12 divisors (see below), whose sum is σ = 130008840. Its totient is φ = 50003280.

The previous prime is 82505497. The next prime is 82505557. The reversal of 82505511 is 11550528.

It is not a de Polignac number, because 82505511 - 2⁶ = 82505447 is a prime.

It is a super-2 number, since 2×82505511² = 13614318690742242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82505561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 416596 + ... + 416793.

It is an arithmetic number, because the mean of its divisors is an integer number (10834070).

Almost surely, 2^82505511 is an apocalyptic number.

82505511 is a deficient number, since it is larger than the sum of its proper divisors (47503329).

82505511 is a wasteful number, since it uses less digits than its factorization.

82505511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833406 (or 833403 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 82505511 is about 9083.2544277918. The cubic root of 82505511 is about 435.3390776771.

The spelling of 82505511 in words is "eighty-two million, five hundred five thousand, five hundred eleven".