87221507357 has 2 divisors, whose sum is σ = 87221507358. Its totient is φ = 87221507356.

The previous prime is 87221507299. The next prime is 87221507441. The reversal of 87221507357 is 75370512278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71563740196 + 15657767161 = 267514^2 + 125131^2 .

It is a cyclic number.

It is not a de Polignac number, because 87221507357 - 2¹⁶ = 87221441821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87221500357) 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, 43610753678 + 43610753679.

It is an arithmetic number, because the mean of its divisors is an integer number (43610753679).

Almost surely, 2^87221507357 is an apocalyptic number.

It is an amenable number.

87221507357 is a deficient number, since it is larger than the sum of its proper divisors (1).

87221507357 is an equidigital number, since it uses as much as digits as its factorization.

87221507357 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 823200, while the sum is 47.

The spelling of 87221507357 in words is "eighty-seven billion, two hundred twenty-one million, five hundred seven thousand, three hundred fifty-seven".