51161543 has 2 divisors, whose sum is σ = 51161544. Its totient is φ = 51161542.

The previous prime is 51161531. The next prime is 51161557. The reversal of 51161543 is 34516115.

51161543 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51161543 - 2⁴ = 51161527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51161503) 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, 25580771 + 25580772.

It is an arithmetic number, because the mean of its divisors is an integer number (25580772).

Almost surely, 2^51161543 is an apocalyptic number.

51161543 is a deficient number, since it is larger than the sum of its proper divisors (1).

51161543 is an equidigital number, since it uses as much as digits as its factorization.

51161543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 26.

The square root of 51161543 is about 7152.7297586306. The cubic root of 51161543 is about 371.2341138286.

Adding to 51161543 its reverse (34516115), we get a palindrome (85677658).

The spelling of 51161543 in words is "fifty-one million, one hundred sixty-one thousand, five hundred forty-three".