53561251 has 2 divisors, whose sum is σ = 53561252. Its totient is φ = 53561250.

The previous prime is 53561243. The next prime is 53561269. The reversal of 53561251 is 15216535.

53561251 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 is a cyclic number.

It is not a de Polignac number, because 53561251 - 2³ = 53561243 is a prime.

It is not a weakly prime, because it can be changed into another prime (53561201) 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, 26780625 + 26780626.

It is an arithmetic number, because the mean of its divisors is an integer number (26780626).

Almost surely, 2^53561251 is an apocalyptic number.

53561251 is a deficient number, since it is larger than the sum of its proper divisors (1).

53561251 is an equidigital number, since it uses as much as digits as its factorization.

53561251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4500, while the sum is 28.

The square root of 53561251 is about 7318.5552536003. Note that the first 3 decimals coincide. The cubic root of 53561251 is about 376.9498463959.

Adding to 53561251 its reverse (15216535), we get a palindrome (68777786).

The spelling of 53561251 in words is "fifty-three million, five hundred sixty-one thousand, two hundred fifty-one".