51512043 has 16 divisors (see below), whose sum is σ = 75772800. Its totient is φ = 30866880.

The previous prime is 51512039. The next prime is 51512099. The reversal of 51512043 is 34021515.

It is not a de Polignac number, because 51512043 - 2² = 51512039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51512443) 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 in 15 ways as a sum of consecutive naturals, for example, 5833 + ... + 11706.

It is an arithmetic number, because the mean of its divisors is an integer number (4735800).

Almost surely, 2^51512043 is an apocalyptic number.

51512043 is a deficient number, since it is larger than the sum of its proper divisors (24260757).

51512043 is a wasteful number, since it uses less digits than its factorization.

51512043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17642.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 51512043 is about 7177.1890737252. The cubic root of 51512043 is about 372.0799414854.

Adding to 51512043 its reverse (34021515), we get a palindrome (85533558).

The spelling of 51512043 in words is "fifty-one million, five hundred twelve thousand, forty-three".