51380233 has 2 divisors, whose sum is σ = 51380234. Its totient is φ = 51380232.

The previous prime is 51380179. The next prime is 51380249. The reversal of 51380233 is 33208315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51380224 + 9 = 7168^2 + 3^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51380233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51380198 and 51380207.

It is not a weakly prime, because it can be changed into another prime (51380033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25690116 + 25690117.

It is an arithmetic number, because the mean of its divisors is an integer number (25690117).

Almost surely, 2^51380233 is an apocalyptic number.

It is an amenable number.

51380233 is a deficient number, since it is larger than the sum of its proper divisors (1).

51380233 is an equidigital number, since it uses as much as digits as its factorization.

51380233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 51380233 is about 7168.0006277902. Note that the first 3 decimals coincide. The cubic root of 51380233 is about 371.7623086546.

Adding to 51380233 its reverse (33208315), we get a palindrome (84588548).

The spelling of 51380233 in words is "fifty-one million, three hundred eighty thousand, two hundred thirty-three".