51518407 has 2 divisors, whose sum is σ = 51518408. Its totient is φ = 51518406.

The previous prime is 51518353. The next prime is 51518417. The reversal of 51518407 is 70481515.

51518407 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 is a cyclic number.

It is not a de Polignac number, because 51518407 - 2¹¹ = 51516359 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51518417) 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, 25759203 + 25759204.

It is an arithmetic number, because the mean of its divisors is an integer number (25759204).

Almost surely, 2^51518407 is an apocalyptic number.

51518407 is a deficient number, since it is larger than the sum of its proper divisors (1).

51518407 is an equidigital number, since it uses as much as digits as its factorization.

51518407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5600, while the sum is 31.

The square root of 51518407 is about 7177.6324090887. The cubic root of 51518407 is about 372.0952635933.

The spelling of 51518407 in words is "fifty-one million, five hundred eighteen thousand, four hundred seven".