2521136531 has 2 divisors, whose sum is σ = 2521136532. Its totient is φ = 2521136530.

The previous prime is 2521136441. The next prime is 2521136549. The reversal of 2521136531 is 1356311252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2521136531 is a prime.

It is a super-3 number, since 3×2521136531³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 2521136494 and 2521136503.

It is not a weakly prime, because it can be changed into another prime (2521136561) 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, 1260568265 + 1260568266.

It is an arithmetic number, because the mean of its divisors is an integer number (1260568266).

Almost surely, 2^2521136531 is an apocalyptic number.

2521136531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521136531 is an equidigital number, since it uses as much as digits as its factorization.

2521136531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 29.

The square root of 2521136531 is about 50210.9204356980. The cubic root of 2521136531 is about 1361.0229707928.

Adding to 2521136531 its reverse (1356311252), we get a palindrome (3877447783).

The spelling of 2521136531 in words is "two billion, five hundred twenty-one million, one hundred thirty-six thousand, five hundred thirty-one".