823255083221 has 2 divisors, whose sum is σ = 823255083222. Its totient is φ = 823255083220.

The previous prime is 823255083199. The next prime is 823255083253. The reversal of 823255083221 is 122380552328.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 528390879025 + 294864204196 = 726905^2 + 543014^2 .

It is a cyclic number.

It is not a de Polignac number, because 823255083221 - 2²² = 823250888917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (823255083281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 411627541610 + 411627541611.

It is an arithmetic number, because the mean of its divisors is an integer number (411627541611).

Almost surely, 2^823255083221 is an apocalyptic number.

It is an amenable number.

823255083221 is a deficient number, since it is larger than the sum of its proper divisors (1).

823255083221 is an equidigital number, since it uses as much as digits as its factorization.

823255083221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 230400, while the sum is 41.

The spelling of 823255083221 in words is "eight hundred twenty-three billion, two hundred fifty-five million, eighty-three thousand, two hundred twenty-one".