83550212521 has 2 divisors, whose sum is σ = 83550212522. Its totient is φ = 83550212520.

The previous prime is 83550212489. The next prime is 83550212611. The reversal of 83550212521 is 12521205538.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52622066025 + 30928146496 = 229395^2 + 175864^2 .

It is a cyclic number.

It is not a de Polignac number, because 83550212521 - 2⁵ = 83550212489 is a prime.

It is not a weakly prime, because it can be changed into another prime (83550212621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41775106260 + 41775106261.

It is an arithmetic number, because the mean of its divisors is an integer number (41775106261).

Almost surely, 2^83550212521 is an apocalyptic number.

It is an amenable number.

83550212521 is a deficient number, since it is larger than the sum of its proper divisors (1).

83550212521 is an equidigital number, since it uses as much as digits as its factorization.

83550212521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24000, while the sum is 34.

The spelling of 83550212521 in words is "eighty-three billion, five hundred fifty million, two hundred twelve thousand, five hundred twenty-one".