2531076521 has 2 divisors, whose sum is σ = 2531076522. Its totient is φ = 2531076520.

The previous prime is 2531076481. The next prime is 2531076523. The reversal of 2531076521 is 1256701352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1377523225 + 1153553296 = 37115^2 + 33964^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2531076521 is a prime.

It is a Sophie Germain prime.

Together with 2531076523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2531076523) 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, 1265538260 + 1265538261.

It is an arithmetic number, because the mean of its divisors is an integer number (1265538261).

Almost surely, 2^2531076521 is an apocalyptic number.

It is an amenable number.

2531076521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2531076521 is an equidigital number, since it uses as much as digits as its factorization.

2531076521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 2531076521 is about 50309.8054160419. The cubic root of 2531076521 is about 1362.8093098621.

Adding to 2531076521 its reverse (1256701352), we get a palindrome (3787777873).

The spelling of 2531076521 in words is "two billion, five hundred thirty-one million, seventy-six thousand, five hundred twenty-one".