51415543 has 2 divisors, whose sum is σ = 51415544. Its totient is φ = 51415542.

The previous prime is 51415523. The next prime is 51415547. The reversal of 51415543 is 34551415.

51415543 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 51415543 - 2²¹ = 49318391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51415547) 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, 25707771 + 25707772.

It is an arithmetic number, because the mean of its divisors is an integer number (25707772).

Almost surely, 2^51415543 is an apocalyptic number.

51415543 is a deficient number, since it is larger than the sum of its proper divisors (1).

51415543 is an equidigital number, since it uses as much as digits as its factorization.

51415543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6000, while the sum is 28.

The square root of 51415543 is about 7170.4632346871. The cubic root of 51415543 is about 371.8474511334.

Adding to 51415543 its reverse (34551415), we get a palindrome (85966958).

The spelling of 51415543 in words is "fifty-one million, four hundred fifteen thousand, five hundred forty-three".