2587361321 has 2 divisors, whose sum is σ = 2587361322. Its totient is φ = 2587361320.

The previous prime is 2587361239. The next prime is 2587361323. The reversal of 2587361321 is 1231637852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2233507600 + 353853721 = 47260^2 + 18811^2 .

It is a cyclic number.

It is not a de Polignac number, because 2587361321 - 2¹⁰ = 2587360297 is a prime.

Together with 2587361323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2587361323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1293680660 + 1293680661.

It is an arithmetic number, because the mean of its divisors is an integer number (1293680661).

Almost surely, 2^2587361321 is an apocalyptic number.

It is an amenable number.

2587361321 is a deficient number, since it is larger than the sum of its proper divisors (1).

2587361321 is an equidigital number, since it uses as much as digits as its factorization.

2587361321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 38.

The square root of 2587361321 is about 50866.1117149719. Note that the first 3 decimals coincide. The cubic root of 2587361321 is about 1372.8371631836.

The spelling of 2587361321 in words is "two billion, five hundred eighty-seven million, three hundred sixty-one thousand, three hundred twenty-one".