51141405209 has 2 divisors, whose sum is σ = 51141405210. Its totient is φ = 51141405208.

The previous prime is 51141405197. The next prime is 51141405221. The reversal of 51141405209 is 90250414115.

51141405209 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (51141405197) and next prime (51141405221).

It can be written as a sum of positive squares in only one way, i.e., 38192103184 + 12949302025 = 195428^2 + 113795^2 .

It is a cyclic number.

It is not a de Polignac number, because 51141405209 - 2⁴ = 51141405193 is a prime.

It is a super-2 number, since 2×51141405209² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51141405239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25570702604 + 25570702605.

It is an arithmetic number, because the mean of its divisors is an integer number (25570702605).

Almost surely, 2^51141405209 is an apocalyptic number.

It is an amenable number.

51141405209 is a deficient number, since it is larger than the sum of its proper divisors (1).

51141405209 is an equidigital number, since it uses as much as digits as its factorization.

51141405209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7200, while the sum is 32.

The spelling of 51141405209 in words is "fifty-one billion, one hundred forty-one million, four hundred five thousand, two hundred nine".