287221568201 has 2 divisors, whose sum is σ = 287221568202. Its totient is φ = 287221568200.

The previous prime is 287221568149. The next prime is 287221568237. The reversal of 287221568201 is 102865122782.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 184036710025 + 103184858176 = 428995^2 + 321224^2 .

It is a cyclic number.

It is not a de Polignac number, because 287221568201 - 2²⁶ = 287154459337 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (287221568251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 143610784100 + 143610784101.

It is an arithmetic number, because the mean of its divisors is an integer number (143610784101).

Almost surely, 2^287221568201 is an apocalyptic number.

It is an amenable number.

287221568201 is a deficient number, since it is larger than the sum of its proper divisors (1).

287221568201 is an equidigital number, since it uses as much as digits as its factorization.

287221568201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 215040, while the sum is 44.

The spelling of 287221568201 in words is "two hundred eighty-seven billion, two hundred twenty-one million, five hundred sixty-eight thousand, two hundred one".