2521667887 has 2 divisors, whose sum is σ = 2521667888. Its totient is φ = 2521667886.

The previous prime is 2521667881. The next prime is 2521667891. The reversal of 2521667887 is 7887661252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2521667887 - 2²⁷ = 2387450159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2521667881) 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, 1260833943 + 1260833944.

It is an arithmetic number, because the mean of its divisors is an integer number (1260833944).

Almost surely, 2^2521667887 is an apocalyptic number.

2521667887 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521667887 is an equidigital number, since it uses as much as digits as its factorization.

2521667887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2257920, while the sum is 52.

The square root of 2521667887 is about 50216.2113963210. The cubic root of 2521667887 is about 1361.1185807042.

The spelling of 2521667887 in words is "two billion, five hundred twenty-one million, six hundred sixty-seven thousand, eight hundred eighty-seven".