82355521 has 2 divisors, whose sum is σ = 82355522. Its totient is φ = 82355520.

The previous prime is 82355503. The next prime is 82355569. The reversal of 82355521 is 12555328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80353296 + 2002225 = 8964^2 + 1415^2 .

It is a cyclic number.

It is not a de Polignac number, because 82355521 - 2⁵ = 82355489 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (82355321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41177760 + 41177761.

It is an arithmetic number, because the mean of its divisors is an integer number (41177761).

Almost surely, 2^82355521 is an apocalyptic number.

It is an amenable number.

82355521 is a deficient number, since it is larger than the sum of its proper divisors (1).

82355521 is an equidigital number, since it uses as much as digits as its factorization.

82355521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12000, while the sum is 31.

The square root of 82355521 is about 9074.9942699706. The cubic root of 82355521 is about 435.0751110005.

The spelling of 82355521 in words is "eighty-two million, three hundred fifty-five thousand, five hundred twenty-one".