52581691 has 2 divisors, whose sum is σ = 52581692. Its totient is φ = 52581690.

The previous prime is 52581679. The next prime is 52581719. The reversal of 52581691 is 19618525.

52581691 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 52581691 - 2¹⁹ = 52057403 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 52581691.

It is not a weakly prime, because it can be changed into another prime (52581601) 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, 26290845 + 26290846.

It is an arithmetic number, because the mean of its divisors is an integer number (26290846).

Almost surely, 2^52581691 is an apocalyptic number.

52581691 is a deficient number, since it is larger than the sum of its proper divisors (1).

52581691 is an equidigital number, since it uses as much as digits as its factorization.

52581691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21600, while the sum is 37.

The square root of 52581691 is about 7251.3233964567. The cubic root of 52581691 is about 374.6377325158.

The spelling of 52581691 in words is "fifty-two million, five hundred eighty-one thousand, six hundred ninety-one".