51466729 has 2 divisors, whose sum is σ = 51466730. Its totient is φ = 51466728.

The previous prime is 51466721. The next prime is 51466747. The reversal of 51466729 is 92766415.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29160000 + 22306729 = 5400^2 + 4723^2 .

It is a cyclic number.

It is not a de Polignac number, because 51466729 - 2³ = 51466721 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51466691 and 51466700.

It is not a weakly prime, because it can be changed into another prime (51466721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25733364 + 25733365.

It is an arithmetic number, because the mean of its divisors is an integer number (25733365).

Almost surely, 2^51466729 is an apocalyptic number.

It is an amenable number.

51466729 is a deficient number, since it is larger than the sum of its proper divisors (1).

51466729 is an equidigital number, since it uses as much as digits as its factorization.

51466729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 40.

The square root of 51466729 is about 7174.0315722751. The cubic root of 51466729 is about 371.9708059912.

The spelling of 51466729 in words is "fifty-one million, four hundred sixty-six thousand, seven hundred twenty-nine".