5151331421 has 2 divisors, whose sum is σ = 5151331422. Its totient is φ = 5151331420.

The previous prime is 5151331399. The next prime is 5151331429. The reversal of 5151331421 is 1241331515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4567867396 + 583464025 = 67586^2 + 24155^2 .

It is a cyclic number.

It is not a de Polignac number, because 5151331421 - 2²⁶ = 5084222557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5151331429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2575665710 + 2575665711.

It is an arithmetic number, because the mean of its divisors is an integer number (2575665711).

Almost surely, 2^5151331421 is an apocalyptic number.

It is an amenable number.

5151331421 is a deficient number, since it is larger than the sum of its proper divisors (1).

5151331421 is an equidigital number, since it uses as much as digits as its factorization.

5151331421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 5151331421 is about 71772.7763222240. The cubic root of 5151331421 is about 1727.0563080943.

Adding to 5151331421 its reverse (1241331515), we get a palindrome (6392662936).

The spelling of 5151331421 in words is "five billion, one hundred fifty-one million, three hundred thirty-one thousand, four hundred twenty-one".