51337861 has 2 divisors, whose sum is σ = 51337862. Its totient is φ = 51337860.

The previous prime is 51337837. The next prime is 51337877. The reversal of 51337861 is 16873315.

51337861 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., 28153636 + 23184225 = 5306^2 + 4815^2 .

It is a cyclic number.

It is not a de Polignac number, because 51337861 - 2⁷ = 51337733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51337361) 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, 25668930 + 25668931.

It is an arithmetic number, because the mean of its divisors is an integer number (25668931).

Almost surely, 2^51337861 is an apocalyptic number.

It is an amenable number.

51337861 is a deficient number, since it is larger than the sum of its proper divisors (1).

51337861 is an equidigital number, since it uses as much as digits as its factorization.

51337861 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15120, while the sum is 34.

The square root of 51337861 is about 7165.0443822771. The cubic root of 51337861 is about 371.6600861734.

The spelling of 51337861 in words is "fifty-one million, three hundred thirty-seven thousand, eight hundred sixty-one".