51057397 has 2 divisors, whose sum is σ = 51057398. Its totient is φ = 51057396.

The previous prime is 51057353. The next prime is 51057451. The reversal of 51057397 is 79375015.

It is a happy number.

51057397 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46430596 + 4626801 = 6814^2 + 2151^2 .

It is a cyclic number.

It is not a de Polignac number, because 51057397 - 2⁷ = 51057269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51057337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25528698 + 25528699.

It is an arithmetic number, because the mean of its divisors is an integer number (25528699).

Almost surely, 2^51057397 is an apocalyptic number.

It is an amenable number.

51057397 is a deficient number, since it is larger than the sum of its proper divisors (1).

51057397 is an equidigital number, since it uses as much as digits as its factorization.

51057397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 33075, while the sum is 37.

The square root of 51057397 is about 7145.4458923149. The cubic root of 51057397 is about 370.9820442096.

The spelling of 51057397 in words is "fifty-one million, fifty-seven thousand, three hundred ninety-seven".