82550861 has 16 divisors (see below), whose sum is σ = 90874368. Its totient is φ = 74727360.

The previous prime is 82550837. The next prime is 82550863. The reversal of 82550861 is 16805528.

It is a happy number.

It is not a de Polignac number, because 82550861 - 2¹⁰ = 82549837 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82550863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 506366 + ... + 506528.

It is an arithmetic number, because the mean of its divisors is an integer number (5679648).

Almost surely, 2^82550861 is an apocalyptic number.

It is an amenable number.

82550861 is a deficient number, since it is larger than the sum of its proper divisors (8323507).

82550861 is an equidigital number, since it uses as much as digits as its factorization.

82550861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 82550861 is about 9085.7504368104. The cubic root of 82550861 is about 435.4188259299.

The spelling of 82550861 in words is "eighty-two million, five hundred fifty thousand, eight hundred sixty-one".