51233513 has 2 divisors, whose sum is σ = 51233514. Its totient is φ = 51233512.

The previous prime is 51233503. The next prime is 51233521. The reversal of 51233513 is 31533215.

51233513 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., 31899904 + 19333609 = 5648^2 + 4397^2 .

It is a cyclic number.

It is not a de Polignac number, because 51233513 - 2¹² = 51229417 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51233503) 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, 25616756 + 25616757.

It is an arithmetic number, because the mean of its divisors is an integer number (25616757).

Almost surely, 2^51233513 is an apocalyptic number.

It is an amenable number.

51233513 is a deficient number, since it is larger than the sum of its proper divisors (1).

51233513 is an equidigital number, since it uses as much as digits as its factorization.

51233513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1350, while the sum is 23.

The square root of 51233513 is about 7157.7589369858. The cubic root of 51233513 is about 371.4081065014.

Adding to 51233513 its reverse (31533215), we get a palindrome (82766728).

The spelling of 51233513 in words is "fifty-one million, two hundred thirty-three thousand, five hundred thirteen".