82565813211 has 32 divisors (see below), whose sum is σ = 127144842240. Its totient is φ = 46682400384.

The previous prime is 82565813207. The next prime is 82565813237. The reversal of 82565813211 is 11231856528.

It is not a de Polignac number, because 82565813211 - 2² = 82565813207 is a prime.

It is a super-2 number, since 2×82565813211² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82565813251) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2607985 + ... + 2639453.

It is an arithmetic number, because the mean of its divisors is an integer number (3973276320).

Almost surely, 2^82565813211 is an apocalyptic number.

82565813211 is a deficient number, since it is larger than the sum of its proper divisors (44579029029).

82565813211 is a wasteful number, since it uses less digits than its factorization.

82565813211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32795.

The product of its digits is 115200, while the sum is 42.

The spelling of 82565813211 in words is "eighty-two billion, five hundred sixty-five million, eight hundred thirteen thousand, two hundred eleven".