51340217 has 2 divisors, whose sum is σ = 51340218. Its totient is φ = 51340216.

The previous prime is 51340213. The next prime is 51340229. The reversal of 51340217 is 71204315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29986576 + 21353641 = 5476^2 + 4621^2 .

It is a cyclic number.

It is not a de Polignac number, because 51340217 - 2² = 51340213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51340192 and 51340201.

It is not a weakly prime, because it can be changed into another prime (51340213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25670108 + 25670109.

It is an arithmetic number, because the mean of its divisors is an integer number (25670109).

Almost surely, 2^51340217 is an apocalyptic number.

It is an amenable number.

51340217 is a deficient number, since it is larger than the sum of its proper divisors (1).

51340217 is an equidigital number, since it uses as much as digits as its factorization.

51340217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 51340217 is about 7165.2087897004. The cubic root of 51340217 is about 371.6657715016.

The spelling of 51340217 in words is "fifty-one million, three hundred forty thousand, two hundred seventeen".