51609277 has 2 divisors, whose sum is σ = 51609278. Its totient is φ = 51609276.

The previous prime is 51609269. The next prime is 51609287. The reversal of 51609277 is 77290615.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47692836 + 3916441 = 6906^2 + 1979^2 .

It is a cyclic number.

It is not a de Polignac number, because 51609277 - 2³ = 51609269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51609287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25804638 + 25804639.

It is an arithmetic number, because the mean of its divisors is an integer number (25804639).

Almost surely, 2^51609277 is an apocalyptic number.

It is an amenable number.

51609277 is a deficient number, since it is larger than the sum of its proper divisors (1).

51609277 is an equidigital number, since it uses as much as digits as its factorization.

51609277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26460, while the sum is 37.

The square root of 51609277 is about 7183.9597020028. The cubic root of 51609277 is about 372.3139067168.

The spelling of 51609277 in words is "fifty-one million, six hundred nine thousand, two hundred seventy-seven".