51069761 has 2 divisors, whose sum is σ = 51069762. Its totient is φ = 51069760.

The previous prime is 51069727. The next prime is 51069763. The reversal of 51069761 is 16796015.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34586161 + 16483600 = 5881^2 + 4060^2 .

It is a cyclic number.

It is not a de Polignac number, because 51069761 - 2¹⁰ = 51068737 is a prime.

It is a Sophie Germain prime.

Together with 51069763, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (51069763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25534880 + 25534881.

It is an arithmetic number, because the mean of its divisors is an integer number (25534881).

Almost surely, 2^51069761 is an apocalyptic number.

It is an amenable number.

51069761 is a deficient number, since it is larger than the sum of its proper divisors (1).

51069761 is an equidigital number, since it uses as much as digits as its factorization.

51069761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 51069761 is about 7146.3110063864. The cubic root of 51069761 is about 371.0119873198.

The spelling of 51069761 in words is "fifty-one million, sixty-nine thousand, seven hundred sixty-one".