51415447 has 2 divisors, whose sum is σ = 51415448. Its totient is φ = 51415446.

The previous prime is 51415379. The next prime is 51415451. The reversal of 51415447 is 74451415.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51415447 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 (51415457) 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, 25707723 + 25707724.

It is an arithmetic number, because the mean of its divisors is an integer number (25707724).

Almost surely, 2^51415447 is an apocalyptic number.

51415447 is a deficient number, since it is larger than the sum of its proper divisors (1).

51415447 is an equidigital number, since it uses as much as digits as its factorization.

51415447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11200, while the sum is 31.

The square root of 51415447 is about 7170.4565405558. The cubic root of 51415447 is about 371.8472197029.

The spelling of 51415447 in words is "fifty-one million, four hundred fifteen thousand, four hundred forty-seven".