51349849 has 2 divisors, whose sum is σ = 51349850. Its totient is φ = 51349848.

The previous prime is 51349847. The next prime is 51349853. The reversal of 51349849 is 94894315.

It is a happy number.

51349849 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., 44796249 + 6553600 = 6693^2 + 2560^2 .

It is a cyclic number.

It is not a de Polignac number, because 51349849 - 2¹ = 51349847 is a prime.

Together with 51349847, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51349847) 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, 25674924 + 25674925.

It is an arithmetic number, because the mean of its divisors is an integer number (25674925).

Almost surely, 2^51349849 is an apocalyptic number.

It is an amenable number.

51349849 is a deficient number, since it is larger than the sum of its proper divisors (1).

51349849 is an equidigital number, since it uses as much as digits as its factorization.

51349849 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 155520, while the sum is 43.

The square root of 51349849 is about 7165.8808949075. The cubic root of 51349849 is about 371.6890129360.

The spelling of 51349849 in words is "fifty-one million, three hundred forty-nine thousand, eight hundred forty-nine".