51840407 has 2 divisors, whose sum is σ = 51840408. Its totient is φ = 51840406.

The previous prime is 51840377. The next prime is 51840419. The reversal of 51840407 is 70404815.

51840407 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 51840407 - 2¹⁰ = 51839383 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51840407.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51840427) 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, 25920203 + 25920204.

It is an arithmetic number, because the mean of its divisors is an integer number (25920204).

Almost surely, 2^51840407 is an apocalyptic number.

51840407 is a deficient number, since it is larger than the sum of its proper divisors (1).

51840407 is an equidigital number, since it uses as much as digits as its factorization.

51840407 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 51840407 is about 7200.0282638334. The cubic root of 51840407 is about 372.8688765172.

The spelling of 51840407 in words is "fifty-one million, eight hundred forty thousand, four hundred seven".