82590931221 has 16 divisors (see below), whose sum is σ = 112400555904. Its totient is φ = 53924696384.

The previous prime is 82590931201. The next prime is 82590931243. The reversal of 82590931221 is 12213909528.

It is a cyclic number.

It is not a de Polignac number, because 82590931221 - 2²⁵ = 82557376789 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82590931201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 377721 + ... + 554846.

It is an arithmetic number, because the mean of its divisors is an integer number (7025034744).

Almost surely, 2^82590931221 is an apocalyptic number.

It is an amenable number.

82590931221 is a deficient number, since it is larger than the sum of its proper divisors (29809624683).

82590931221 is a wasteful number, since it uses less digits than its factorization.

82590931221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 933180.

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 82590931221 in words is "eighty-two billion, five hundred ninety million, nine hundred thirty-one thousand, two hundred twenty-one".