51090133 has 2 divisors, whose sum is σ = 51090134. Its totient is φ = 51090132.

The previous prime is 51090119. The next prime is 51090167. The reversal of 51090133 is 33109015.

51090133 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., 39652209 + 11437924 = 6297^2 + 3382^2 .

It is a cyclic number.

It is not a de Polignac number, because 51090133 - 2⁵ = 51090101 is a prime.

It is a super-2 number, since 2×51090133² = 5220403379915378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51090173) 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, 25545066 + 25545067.

It is an arithmetic number, because the mean of its divisors is an integer number (25545067).

Almost surely, 2^51090133 is an apocalyptic number.

It is an amenable number.

51090133 is a deficient number, since it is larger than the sum of its proper divisors (1).

51090133 is an equidigital number, since it uses as much as digits as its factorization.

51090133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 405, while the sum is 22.

The square root of 51090133 is about 7147.7362150544. The cubic root of 51090133 is about 371.0613136483.

Adding to 51090133 its reverse (33109015), we get a palindrome (84199148).

The spelling of 51090133 in words is "fifty-one million, ninety thousand, one hundred thirty-three".