51254521 has 2 divisors, whose sum is σ = 51254522. Its totient is φ = 51254520.

The previous prime is 51254503. The next prime is 51254549. The reversal of 51254521 is 12545215.

51254521 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., 32936121 + 18318400 = 5739^2 + 4280^2 .

It is a cyclic number.

It is not a de Polignac number, because 51254521 - 2⁹ = 51254009 is a prime.

It is not a weakly prime, because it can be changed into another prime (51254591) 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, 25627260 + 25627261.

It is an arithmetic number, because the mean of its divisors is an integer number (25627261).

Almost surely, 2^51254521 is an apocalyptic number.

It is an amenable number.

51254521 is a deficient number, since it is larger than the sum of its proper divisors (1).

51254521 is an equidigital number, since it uses as much as digits as its factorization.

51254521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2000, while the sum is 25.

The square root of 51254521 is about 7159.2262850115. The cubic root of 51254521 is about 371.4588641326.

Adding to 51254521 its reverse (12545215), we get a palindrome (63799736).

The spelling of 51254521 in words is "fifty-one million, two hundred fifty-four thousand, five hundred twenty-one".