51555089 has 2 divisors, whose sum is σ = 51555090. Its totient is φ = 51555088.

The previous prime is 51555047. The next prime is 51555103. The reversal of 51555089 is 98055515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44622400 + 6932689 = 6680^2 + 2633^2 .

It is a cyclic number.

It is not a de Polignac number, because 51555089 - 2²⁰ = 50506513 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51555289) 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, 25777544 + 25777545.

It is an arithmetic number, because the mean of its divisors is an integer number (25777545).

Almost surely, 2^51555089 is an apocalyptic number.

It is an amenable number.

51555089 is a deficient number, since it is larger than the sum of its proper divisors (1).

51555089 is an equidigital number, since it uses as much as digits as its factorization.

51555089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45000, while the sum is 38.

The square root of 51555089 is about 7180.1872538256. The cubic root of 51555089 is about 372.1835554035.

The spelling of 51555089 in words is "fifty-one million, five hundred fifty-five thousand, eighty-nine".