51275761 has 2 divisors, whose sum is σ = 51275762. Its totient is φ = 51275760.

The previous prime is 51275759. The next prime is 51275771. The reversal of 51275761 is 16757215.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46785600 + 4490161 = 6840^2 + 2119^2 .

It is a cyclic number.

It is not a de Polignac number, because 51275761 - 2¹ = 51275759 is a prime.

It is a super-2 number, since 2×51275761² = 5258407332258242, which contains 22 as substring.

Together with 51275759, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51275771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25637880 + 25637881.

It is an arithmetic number, because the mean of its divisors is an integer number (25637881).

Almost surely, 2^51275761 is an apocalyptic number.

It is an amenable number.

51275761 is a deficient number, since it is larger than the sum of its proper divisors (1).

51275761 is an equidigital number, since it uses as much as digits as its factorization.

51275761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 34.

The square root of 51275761 is about 7160.7095318830. The cubic root of 51275761 is about 371.5101682031.

The spelling of 51275761 in words is "fifty-one million, two hundred seventy-five thousand, seven hundred sixty-one".