51252341209 has 2 divisors, whose sum is σ = 51252341210. Its totient is φ = 51252341208.

The previous prime is 51252341197. The next prime is 51252341213. The reversal of 51252341209 is 90214325215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41406145225 + 9846195984 = 203485^2 + 99228^2 .

It is a cyclic number.

It is not a de Polignac number, because 51252341209 - 2¹¹ = 51252339161 is a prime.

It is not a weakly prime, because it can be changed into another prime (51252341269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25626170604 + 25626170605.

It is an arithmetic number, because the mean of its divisors is an integer number (25626170605).

Almost surely, 2^51252341209 is an apocalyptic number.

It is an amenable number.

51252341209 is a deficient number, since it is larger than the sum of its proper divisors (1).

51252341209 is an equidigital number, since it uses as much as digits as its factorization.

51252341209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 51252341209 in words is "fifty-one billion, two hundred fifty-two million, three hundred forty-one thousand, two hundred nine".