2571238987 has 2 divisors, whose sum is σ = 2571238988. Its totient is φ = 2571238986.

The previous prime is 2571238981. The next prime is 2571239009. The reversal of 2571238987 is 7898321752.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2571238987 is a prime.

It is a super-2 number, since 2×2571238987² = 13222539856537572338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2571238981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1285619493 + 1285619494.

It is an arithmetic number, because the mean of its divisors is an integer number (1285619494).

Almost surely, 2^2571238987 is an apocalyptic number.

2571238987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2571238987 is an equidigital number, since it uses as much as digits as its factorization.

2571238987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1693440, while the sum is 52.

The square root of 2571238987 is about 50707.3859215795. The cubic root of 2571238987 is about 1369.9797512414.

The spelling of 2571238987 in words is "two billion, five hundred seventy-one million, two hundred thirty-eight thousand, nine hundred eighty-seven".