51085393 has 2 divisors, whose sum is σ = 51085394. Its totient is φ = 51085392.

The previous prime is 51085361. The next prime is 51085409. The reversal of 51085393 is 39358015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46471489 + 4613904 = 6817^2 + 2148^2 .

It is a cyclic number.

It is not a de Polignac number, because 51085393 - 2⁵ = 51085361 is a prime.

It is not a weakly prime, because it can be changed into another prime (51085313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25542696 + 25542697.

It is an arithmetic number, because the mean of its divisors is an integer number (25542697).

Almost surely, 2^51085393 is an apocalyptic number.

It is an amenable number.

51085393 is a deficient number, since it is larger than the sum of its proper divisors (1).

51085393 is an equidigital number, since it uses as much as digits as its factorization.

51085393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 51085393 is about 7147.4046338514. The cubic root of 51085393 is about 371.0498379489.

It can be divided in two parts, 5108 and 5393, that added together give a palindrome (10501).

The spelling of 51085393 in words is "fifty-one million, eighty-five thousand, three hundred ninety-three".