5151515251 has 2 divisors, whose sum is σ = 5151515252. Its totient is φ = 5151515250.

The previous prime is 5151515249. The next prime is 5151515261. The reversal of 5151515251 is 1525151515.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5151515251 - 2¹ = 5151515249 is a prime.

Together with 5151515249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (5151515221) 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, 2575757625 + 2575757626.

It is an arithmetic number, because the mean of its divisors is an integer number (2575757626).

Almost surely, 2^5151515251 is an apocalyptic number.

5151515251 is a deficient number, since it is larger than the sum of its proper divisors (1).

5151515251 is an equidigital number, since it uses as much as digits as its factorization.

5151515251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6250, while the sum is 31.

The square root of 5151515251 is about 71774.0569495692. The cubic root of 5151515251 is about 1727.0768517143.

Adding to 5151515251 its reverse (1525151515), we get a palindrome (6676666766).

It can be divided in two parts, 51515 and 15251, that added together give a palindrome (66766).

The spelling of 5151515251 in words is "five billion, one hundred fifty-one million, five hundred fifteen thousand, two hundred fifty-one".