2511561251 has 2 divisors, whose sum is σ = 2511561252. Its totient is φ = 2511561250.

The previous prime is 2511561233. The next prime is 2511561253. The reversal of 2511561251 is 1521651152.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2511561251 - 2⁶ = 2511561187 is a prime.

Together with 2511561253, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2511561253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1255780625 + 1255780626.

It is an arithmetic number, because the mean of its divisors is an integer number (1255780626).

Almost surely, 2^2511561251 is an apocalyptic number.

2511561251 is a deficient number, since it is larger than the sum of its proper divisors (1).

2511561251 is an equidigital number, since it uses as much as digits as its factorization.

2511561251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3000, while the sum is 29.

The square root of 2511561251 is about 50115.4791556461. The cubic root of 2511561251 is about 1359.2977290863.

The spelling of 2511561251 in words is "two billion, five hundred eleven million, five hundred sixty-one thousand, two hundred fifty-one".