51420307 has 2 divisors, whose sum is σ = 51420308. Its totient is φ = 51420306.

The previous prime is 51420301. The next prime is 51420319. The reversal of 51420307 is 70302415.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51420307 - 2⁷ = 51420179 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51420301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25710153 + 25710154.

It is an arithmetic number, because the mean of its divisors is an integer number (25710154).

Almost surely, 2^51420307 is an apocalyptic number.

51420307 is a deficient number, since it is larger than the sum of its proper divisors (1).

51420307 is an equidigital number, since it uses as much as digits as its factorization.

51420307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 51420307 is about 7170.7954231034. The cubic root of 51420307 is about 371.8589355111.

The spelling of 51420307 in words is "fifty-one million, four hundred twenty thousand, three hundred seven".