51813929 has 2 divisors, whose sum is σ = 51813930. Its totient is φ = 51813928.

The previous prime is 51813911. The next prime is 51813941. The reversal of 51813929 is 92931815.

51813929 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., 39980329 + 11833600 = 6323^2 + 3440^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51813929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51813892 and 51813901.

It is not a weakly prime, because it can be changed into another prime (51813529) 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, 25906964 + 25906965.

It is an arithmetic number, because the mean of its divisors is an integer number (25906965).

Almost surely, 2^51813929 is an apocalyptic number.

It is an amenable number.

51813929 is a deficient number, since it is larger than the sum of its proper divisors (1).

51813929 is an equidigital number, since it uses as much as digits as its factorization.

51813929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19440, while the sum is 38.

The square root of 51813929 is about 7198.1892862025. The cubic root of 51813929 is about 372.8053835520.

The spelling of 51813929 in words is "fifty-one million, eight hundred thirteen thousand, nine hundred twenty-nine".