87315210209 has 2 divisors, whose sum is σ = 87315210210. Its totient is φ = 87315210208.

The previous prime is 87315210197. The next prime is 87315210217. The reversal of 87315210209 is 90201251378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 76153921600 + 11161288609 = 275960^2 + 105647^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87315210209 is a prime.

It is not a weakly prime, because it can be changed into another prime (87315230209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43657605104 + 43657605105.

It is an arithmetic number, because the mean of its divisors is an integer number (43657605105).

Almost surely, 2^87315210209 is an apocalyptic number.

It is an amenable number.

87315210209 is a deficient number, since it is larger than the sum of its proper divisors (1).

87315210209 is an equidigital number, since it uses as much as digits as its factorization.

87315210209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 38.

The spelling of 87315210209 in words is "eighty-seven billion, three hundred fifteen million, two hundred ten thousand, two hundred nine".