51560591 has 2 divisors, whose sum is σ = 51560592. Its totient is φ = 51560590.

The previous prime is 51560581. The next prime is 51560599. The reversal of 51560591 is 19506515.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51560591 - 2¹⁸ = 51298447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51560599) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25780295 + 25780296.

It is an arithmetic number, because the mean of its divisors is an integer number (25780296).

Almost surely, 2^51560591 is an apocalyptic number.

51560591 is a deficient number, since it is larger than the sum of its proper divisors (1).

51560591 is an equidigital number, since it uses as much as digits as its factorization.

51560591 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6750, while the sum is 32.

The square root of 51560591 is about 7180.5703812441. The cubic root of 51560591 is about 372.1967948407.

The spelling of 51560591 in words is "fifty-one million, five hundred sixty thousand, five hundred ninety-one".