51312929 has 2 divisors, whose sum is σ = 51312930. Its totient is φ = 51312928.

The previous prime is 51312913. The next prime is 51312959. The reversal of 51312929 is 92921315.

51312929 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., 31528225 + 19784704 = 5615^2 + 4448^2 .

It is a cyclic number.

It is not a de Polignac number, because 51312929 - 2⁴ = 51312913 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51312895 and 51312904.

It is not a weakly prime, because it can be changed into another prime (51312959) 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, 25656464 + 25656465.

It is an arithmetic number, because the mean of its divisors is an integer number (25656465).

Almost surely, 2^51312929 is an apocalyptic number.

It is an amenable number.

51312929 is a deficient number, since it is larger than the sum of its proper divisors (1).

51312929 is an equidigital number, since it uses as much as digits as its factorization.

51312929 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4860, while the sum is 32.

The square root of 51312929 is about 7163.3043352911. The cubic root of 51312929 is about 371.5999114179.

The spelling of 51312929 in words is "fifty-one million, three hundred twelve thousand, nine hundred twenty-nine".