51578089 has 2 divisors, whose sum is σ = 51578090. Its totient is φ = 51578088.

The previous prime is 51578071. The next prime is 51578159. The reversal of 51578089 is 98087515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49843600 + 1734489 = 7060^2 + 1317^2 .

It is a cyclic number.

It is not a de Polignac number, because 51578089 - 2⁵ = 51578057 is a prime.

It is not a weakly prime, because it can be changed into another prime (51578039) 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, 25789044 + 25789045.

It is an arithmetic number, because the mean of its divisors is an integer number (25789045).

Almost surely, 2^51578089 is an apocalyptic number.

It is an amenable number.

51578089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51578089 is an equidigital number, since it uses as much as digits as its factorization.

51578089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100800, while the sum is 43.

The square root of 51578089 is about 7181.7887047726. The cubic root of 51578089 is about 372.2388939374.

The spelling of 51578089 in words is "fifty-one million, five hundred seventy-eight thousand, eighty-nine".