51787297 has 2 divisors, whose sum is σ = 51787298. Its totient is φ = 51787296.

The previous prime is 51787291. The next prime is 51787303. The reversal of 51787297 is 79278715.

It is a balanced prime because it is at equal distance from previous prime (51787291) and next prime (51787303).

It can be written as a sum of positive squares in only one way, i.e., 47941776 + 3845521 = 6924^2 + 1961^2 .

It is a cyclic number.

It is not a de Polignac number, because 51787297 - 2³ = 51787289 is a prime.

It is not a weakly prime, because it can be changed into another prime (51787291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25893648 + 25893649.

It is an arithmetic number, because the mean of its divisors is an integer number (25893649).

Almost surely, 2^51787297 is an apocalyptic number.

It is an amenable number.

51787297 is a deficient number, since it is larger than the sum of its proper divisors (1).

51787297 is an equidigital number, since it uses as much as digits as its factorization.

51787297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 246960, while the sum is 46.

The square root of 51787297 is about 7196.3391387566. The cubic root of 51787297 is about 372.7414994786.

The spelling of 51787297 in words is "fifty-one million, seven hundred eighty-seven thousand, two hundred ninety-seven".