51438347 has 2 divisors, whose sum is σ = 51438348. Its totient is φ = 51438346.

The previous prime is 51438319. The next prime is 51438349. The reversal of 51438347 is 74383415.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51438347 is a prime.

Together with 51438349, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51438349) 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, 25719173 + 25719174.

It is an arithmetic number, because the mean of its divisors is an integer number (25719174).

Almost surely, 2^51438347 is an apocalyptic number.

51438347 is a deficient number, since it is larger than the sum of its proper divisors (1).

51438347 is an equidigital number, since it uses as much as digits as its factorization.

51438347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 40320, while the sum is 35.

The square root of 51438347 is about 7172.0531927754. The cubic root of 51438347 is about 371.9024173651.

The spelling of 51438347 in words is "fifty-one million, four hundred thirty-eight thousand, three hundred forty-seven".