82421529401 has 2 divisors, whose sum is σ = 82421529402. Its totient is φ = 82421529400.

The previous prime is 82421529361. The next prime is 82421529439. The reversal of 82421529401 is 10492512428.

It is an a-pointer prime, because the next prime (82421529439) can be obtained adding 82421529401 to its sum of digits (38).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80940819001 + 1480710400 = 284501^2 + 38480^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-82421529401 is a prime.

It is not a weakly prime, because it can be changed into another prime (82421529481) 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 as a sum of consecutive naturals, namely, 41210764700 + 41210764701.

It is an arithmetic number, because the mean of its divisors is an integer number (41210764701).

Almost surely, 2^82421529401 is an apocalyptic number.

It is an amenable number.

82421529401 is a deficient number, since it is larger than the sum of its proper divisors (1).

82421529401 is an equidigital number, since it uses as much as digits as its factorization.

82421529401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 82421529401 in words is "eighty-two billion, four hundred twenty-one million, five hundred twenty-nine thousand, four hundred one".