51543568 has 10 divisors (see below), whose sum is σ = 99865694. Its totient is φ = 25771776.

The previous prime is 51543559. The next prime is 51543617. The reversal of 51543568 is 86534515.

It can be written as a sum of positive squares in only one way, i.e., 48274704 + 3268864 = 6948^2 + 1808^2 .

It is an unprimeable number.

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, 1610721 + ... + 1610752.

Almost surely, 2^51543568 is an apocalyptic number.

It is an amenable number.

51543568 is a deficient number, since it is larger than the sum of its proper divisors (48322126).

51543568 is a wasteful number, since it uses less digits than its factorization.

51543568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3221481 (or 3221475 counting only the distinct ones).

The product of its digits is 72000, while the sum is 37.

The square root of 51543568 is about 7179.3849318726. The cubic root of 51543568 is about 372.1558294230.

The spelling of 51543568 in words is "fifty-one million, five hundred forty-three thousand, five hundred sixty-eight".