875086556221 has 2 divisors, whose sum is σ = 875086556222. Its totient is φ = 875086556220.

The previous prime is 875086556167. The next prime is 875086556327. The reversal of 875086556221 is 122655680578.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 828079980121 + 47006576100 = 909989^2 + 216810^2 .

It is a cyclic number.

It is not a de Polignac number, because 875086556221 - 2²¹ = 875084459069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (875086551221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 437543278110 + 437543278111.

It is an arithmetic number, because the mean of its divisors is an integer number (437543278111).

Almost surely, 2^875086556221 is an apocalyptic number.

It is an amenable number.

875086556221 is a deficient number, since it is larger than the sum of its proper divisors (1).

875086556221 is an equidigital number, since it uses as much as digits as its factorization.

875086556221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064000, while the sum is 55.

The spelling of 875086556221 in words is "eight hundred seventy-five billion, eighty-six million, five hundred fifty-six thousand, two hundred twenty-one".