502806089221 has 2 divisors, whose sum is σ = 502806089222. Its totient is φ = 502806089220.

The previous prime is 502806089213. The next prime is 502806089249. The reversal of 502806089221 is 122980608205.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 472725002500 + 30081086721 = 687550^2 + 173439^2 .

It is a cyclic number.

It is not a de Polignac number, because 502806089221 - 2³ = 502806089213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (502806086221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 251403044610 + 251403044611.

It is an arithmetic number, because the mean of its divisors is an integer number (251403044611).

Almost surely, 2^502806089221 is an apocalyptic number.

It is an amenable number.

502806089221 is a deficient number, since it is larger than the sum of its proper divisors (1).

502806089221 is an equidigital number, since it uses as much as digits as its factorization.

502806089221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 138240, while the sum is 43.

The spelling of 502806089221 in words is "five hundred two billion, eight hundred six million, eighty-nine thousand, two hundred twenty-one".