51928249 has 2 divisors, whose sum is σ = 51928250. Its totient is φ = 51928248.

The previous prime is 51928237. The next prime is 51928259. The reversal of 51928249 is 94282915.

51928249 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., 51222649 + 705600 = 7157^2 + 840^2 .

It is a cyclic number.

It is not a de Polignac number, because 51928249 - 2⁹ = 51927737 is a prime.

It is not a weakly prime, because it can be changed into another prime (51928259) 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, 25964124 + 25964125.

It is an arithmetic number, because the mean of its divisors is an integer number (25964125).

Almost surely, 2^51928249 is an apocalyptic number.

It is an amenable number.

51928249 is a deficient number, since it is larger than the sum of its proper divisors (1).

51928249 is an equidigital number, since it uses as much as digits as its factorization.

51928249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 40.

The square root of 51928249 is about 7206.1257968481. The cubic root of 51928249 is about 373.0793626815.

The spelling of 51928249 in words is "fifty-one million, nine hundred twenty-eight thousand, two hundred forty-nine".