51287437 has 2 divisors, whose sum is σ = 51287438. Its totient is φ = 51287436.

The previous prime is 51287429. The next prime is 51287449. The reversal of 51287437 is 73478215.

51287437 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46703556 + 4583881 = 6834^2 + 2141^2 .

It is a cyclic number.

It is not a de Polignac number, because 51287437 - 2³ = 51287429 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51287396 and 51287405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51287477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25643718 + 25643719.

It is an arithmetic number, because the mean of its divisors is an integer number (25643719).

Almost surely, 2^51287437 is an apocalyptic number.

It is an amenable number.

51287437 is a deficient number, since it is larger than the sum of its proper divisors (1).

51287437 is an equidigital number, since it uses as much as digits as its factorization.

51287437 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47040, while the sum is 37.

The square root of 51287437 is about 7161.5247678131. The cubic root of 51287437 is about 371.5383649146.

The spelling of 51287437 in words is "fifty-one million, two hundred eighty-seven thousand, four hundred thirty-seven".