51023568 has 80 divisors (see below), whose sum is σ = 139098240. Its totient is φ = 16084992.

The previous prime is 51023561. The next prime is 51023573. The reversal of 51023568 is 86532015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51023561) 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, 124548 + ... + 124956.

It is an arithmetic number, because the mean of its divisors is an integer number (1738728).

Almost surely, 2^51023568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51023568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69549120).

51023568 is an abundant number, since it is smaller than the sum of its proper divisors (88074672).

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

51023568 is a wasteful number, since it uses less digits than its factorization.

51023568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556 (or 550 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 51023568 is about 7143.0783280040. The cubic root of 51023568 is about 370.9000924908.

The spelling of 51023568 in words is "fifty-one million, twenty-three thousand, five hundred sixty-eight".