51424397 has 2 divisors, whose sum is σ = 51424398. Its totient is φ = 51424396.

The previous prime is 51424369. The next prime is 51424411. The reversal of 51424397 is 79342415.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51423241 + 1156 = 7171^2 + 34^2 .

It is a cyclic number.

It is not a de Polignac number, because 51424397 - 2⁶ = 51424333 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51424327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25712198 + 25712199.

It is an arithmetic number, because the mean of its divisors is an integer number (25712199).

Almost surely, 2^51424397 is an apocalyptic number.

It is an amenable number.

51424397 is a deficient number, since it is larger than the sum of its proper divisors (1).

51424397 is an equidigital number, since it uses as much as digits as its factorization.

51424397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 35.

The square root of 51424397 is about 7171.0806019735. The cubic root of 51424397 is about 371.8687945390.

The spelling of 51424397 in words is "fifty-one million, four hundred twenty-four thousand, three hundred ninety-seven".