5121531251 has 2 divisors, whose sum is σ = 5121531252. Its totient is φ = 5121531250.

The previous prime is 5121531229. The next prime is 5121531313. The reversal of 5121531251 is 1521351215.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5121531251 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 5121531251.

It is not a weakly prime, because it can be changed into another prime (5121530251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2560765625 + 2560765626.

It is an arithmetic number, because the mean of its divisors is an integer number (2560765626).

Almost surely, 2^5121531251 is an apocalyptic number.

5121531251 is a deficient number, since it is larger than the sum of its proper divisors (1).

5121531251 is an equidigital number, since it uses as much as digits as its factorization.

5121531251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1500, while the sum is 26.

The square root of 5121531251 is about 71564.8744217441. The cubic root of 5121531251 is about 1723.7195567885.

Adding to 5121531251 its reverse (1521351215), we get a palindrome (6642882466).

The spelling of 5121531251 in words is "five billion, one hundred twenty-one million, five hundred thirty-one thousand, two hundred fifty-one".