5155251281 has 2 divisors, whose sum is σ = 5155251282. Its totient is φ = 5155251280.

The previous prime is 5155251251. The next prime is 5155251293. The reversal of 5155251281 is 1821525515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4816360000 + 338891281 = 69400^2 + 18409^2 .

It is a cyclic number.

It is not a de Polignac number, because 5155251281 - 2⁶ = 5155251217 is a prime.

It is a super-2 number, since 2×5155251281² = 53153231540504281922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5155251251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2577625640 + 2577625641.

It is an arithmetic number, because the mean of its divisors is an integer number (2577625641).

Almost surely, 2^5155251281 is an apocalyptic number.

It is an amenable number.

5155251281 is a deficient number, since it is larger than the sum of its proper divisors (1).

5155251281 is an equidigital number, since it uses as much as digits as its factorization.

5155251281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20000, while the sum is 35.

The square root of 5155251281 is about 71800.0785584528. The cubic root of 5155251281 is about 1727.4942597595.

Adding to 5155251281 its reverse (1821525515), we get a palindrome (6976776796).

The spelling of 5155251281 in words is "five billion, one hundred fifty-five million, two hundred fifty-one thousand, two hundred eighty-one".