51559801 has 2 divisors, whose sum is σ = 51559802. Its totient is φ = 51559800.

The previous prime is 51559777. The next prime is 51559817. The reversal of 51559801 is 10895515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44903401 + 6656400 = 6701^2 + 2580^2 .

It is a cyclic number.

It is not a de Polignac number, because 51559801 - 2¹⁵ = 51527033 is a prime.

It is not a weakly prime, because it can be changed into another prime (51559891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25779900 + 25779901.

It is an arithmetic number, because the mean of its divisors is an integer number (25779901).

Almost surely, 2^51559801 is an apocalyptic number.

It is an amenable number.

51559801 is a deficient number, since it is larger than the sum of its proper divisors (1).

51559801 is an equidigital number, since it uses as much as digits as its factorization.

51559801 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 34.

The square root of 51559801 is about 7180.5153714758. The cubic root of 51559801 is about 372.1948939252.

The spelling of 51559801 in words is "fifty-one million, five hundred fifty-nine thousand, eight hundred one".