51016543 has 2 divisors, whose sum is σ = 51016544. Its totient is φ = 51016542.

The previous prime is 51016519. The next prime is 51016571. The reversal of 51016543 is 34561015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51016543 - 2²¹ = 48919391 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51016513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25508271 + 25508272.

It is an arithmetic number, because the mean of its divisors is an integer number (25508272).

Almost surely, 2^51016543 is an apocalyptic number.

51016543 is a deficient number, since it is larger than the sum of its proper divisors (1).

51016543 is an equidigital number, since it uses as much as digits as its factorization.

51016543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 51016543 is about 7142.5865763041. The cubic root of 51016543 is about 370.8830696858.

Adding to 51016543 its reverse (34561015), we get a palindrome (85577558).

The spelling of 51016543 in words is "fifty-one million, sixteen thousand, five hundred forty-three".