5151512981 has 2 divisors, whose sum is σ = 5151512982. Its totient is φ = 5151512980.

The previous prime is 5151512963. The next prime is 5151512987. The reversal of 5151512981 is 1892151515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4895800900 + 255712081 = 69970^2 + 15991^2 .

It is a cyclic number.

It is not a de Polignac number, because 5151512981 - 2¹⁰ = 5151511957 is a prime.

It is a super-2 number, since 2×5151512981² = 53076171986823012722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5151512987) 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, 2575756490 + 2575756491.

It is an arithmetic number, because the mean of its divisors is an integer number (2575756491).

Almost surely, 2^5151512981 is an apocalyptic number.

It is an amenable number.

5151512981 is a deficient number, since it is larger than the sum of its proper divisors (1).

5151512981 is an equidigital number, since it uses as much as digits as its factorization.

5151512981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18000, while the sum is 38.

The square root of 5151512981 is about 71774.0411360542. The cubic root of 5151512981 is about 1727.0765980371.

The spelling of 5151512981 in words is "five billion, one hundred fifty-one million, five hundred twelve thousand, nine hundred eighty-one".