51500568 has 48 divisors (see below), whose sum is σ = 149775480. Its totient is φ = 14714112.

The previous prime is 51500567. The next prime is 51500573. The reversal of 51500568 is 86500515.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51500563) 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 11 ways as a sum of consecutive naturals, for example, 20721 + ... + 23072.

Almost surely, 2^51500568 is an apocalyptic number.

It is an amenable number.

51500568 is an abundant number, since it is smaller than the sum of its proper divisors (98274912).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51500568 is a wasteful number, since it uses less digits than its factorization.

51500568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43816 (or 43805 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 51500568 is about 7176.3896215298. The cubic root of 51500568 is about 372.0523108308.

The spelling of 51500568 in words is "fifty-one million, five hundred thousand, five hundred sixty-eight".