51797381 has 2 divisors, whose sum is σ = 51797382. Its totient is φ = 51797380.

The previous prime is 51797359. The next prime is 51797387. The reversal of 51797381 is 18379715.

51797381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38328481 + 13468900 = 6191^2 + 3670^2 .

It is a cyclic number.

It is not a de Polignac number, because 51797381 - 2¹⁰ = 51796357 is a prime.

It is a super-2 number, since 2×51797381² = 5365937356918322, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51797387) 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, 25898690 + 25898691.

It is an arithmetic number, because the mean of its divisors is an integer number (25898691).

Almost surely, 2^51797381 is an apocalyptic number.

It is an amenable number.

51797381 is a deficient number, since it is larger than the sum of its proper divisors (1).

51797381 is an equidigital number, since it uses as much as digits as its factorization.

51797381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 52920, while the sum is 41.

The square root of 51797381 is about 7197.0397386703. The cubic root of 51797381 is about 372.7656912628.

The spelling of 51797381 in words is "fifty-one million, seven hundred ninety-seven thousand, three hundred eighty-one".