51137773 has 2 divisors, whose sum is σ = 51137774. Its totient is φ = 51137772.

The previous prime is 51137729. The next prime is 51137789. The reversal of 51137773 is 37773115.

It is a happy number.

51137773 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46485124 + 4652649 = 6818^2 + 2157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51137773 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51137573) 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, 25568886 + 25568887.

It is an arithmetic number, because the mean of its divisors is an integer number (25568887).

Almost surely, 2^51137773 is an apocalyptic number.

It is an amenable number.

51137773 is a deficient number, since it is larger than the sum of its proper divisors (1).

51137773 is an equidigital number, since it uses as much as digits as its factorization.

51137773 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15435, while the sum is 34.

The square root of 51137773 is about 7151.0679621998. The cubic root of 51137773 is about 371.1766122931.

It can be divided in two parts, 5 and 1137773, that multiplied together give a palindrome (5688865).

The spelling of 51137773 in words is "fifty-one million, one hundred thirty-seven thousand, seven hundred seventy-three".