51562591 has 2 divisors, whose sum is σ = 51562592. Its totient is φ = 51562590.

The previous prime is 51562541. The next prime is 51562613. The reversal of 51562591 is 19526515.

51562591 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 is a cyclic number.

It is not a de Polignac number, because 51562591 - 2⁹ = 51562079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51562501) 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, 25781295 + 25781296.

It is an arithmetic number, because the mean of its divisors is an integer number (25781296).

Almost surely, 2^51562591 is an apocalyptic number.

51562591 is a deficient number, since it is larger than the sum of its proper divisors (1).

51562591 is an equidigital number, since it uses as much as digits as its factorization.

51562591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 34.

The square root of 51562591 is about 7180.7096445964. The cubic root of 51562591 is about 372.2016071980.

The spelling of 51562591 in words is "fifty-one million, five hundred sixty-two thousand, five hundred ninety-one".