51921853 has 2 divisors, whose sum is σ = 51921854. Its totient is φ = 51921852.

The previous prime is 51921839. The next prime is 51921899. The reversal of 51921853 is 35812915.

51921853 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., 40985604 + 10936249 = 6402^2 + 3307^2 .

It is a cyclic number.

It is not a de Polignac number, because 51921853 - 2⁹ = 51921341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51922853) 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, 25960926 + 25960927.

It is an arithmetic number, because the mean of its divisors is an integer number (25960927).

Almost surely, 2^51921853 is an apocalyptic number.

It is an amenable number.

51921853 is a deficient number, since it is larger than the sum of its proper divisors (1).

51921853 is an equidigital number, since it uses as much as digits as its factorization.

51921853 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10800, while the sum is 34.

The square root of 51921853 is about 7205.6819940933. The cubic root of 51921853 is about 373.0640446634.

The spelling of 51921853 in words is "fifty-one million, nine hundred twenty-one thousand, eight hundred fifty-three".