2521868897 has 2 divisors, whose sum is σ = 2521868898. Its totient is φ = 2521868896.

The previous prime is 2521868861. The next prime is 2521868911. The reversal of 2521868897 is 7988681252.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1441037521 + 1080831376 = 37961^2 + 32876^2 .

It is a cyclic number.

It is not a de Polignac number, because 2521868897 - 2¹⁴ = 2521852513 is a prime.

It is not a weakly prime, because it can be changed into another prime (2521861897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260934448 + 1260934449.

It is an arithmetic number, because the mean of its divisors is an integer number (1260934449).

Almost surely, 2^2521868897 is an apocalyptic number.

It is an amenable number.

2521868897 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521868897 is an equidigital number, since it uses as much as digits as its factorization.

2521868897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3870720, while the sum is 56.

The square root of 2521868897 is about 50218.2128017316. The cubic root of 2521868897 is about 1361.1547460768.

The spelling of 2521868897 in words is "two billion, five hundred twenty-one million, eight hundred sixty-eight thousand, eight hundred ninety-seven".