51739568 has 40 divisors (see below), whose sum is σ = 106743168. Its totient is φ = 24210432.

The previous prime is 51739561. The next prime is 51739577. The reversal of 51739568 is 86593715.

It is not an unprimeable number, because it can be changed into a prime (51739561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60230 + ... + 61082.

Almost surely, 2^51739568 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 51739568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53371584).

51739568 is an abundant number, since it is smaller than the sum of its proper divisors (55003600).

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

51739568 is a wasteful number, since it uses less digits than its factorization.

51739568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101 (or 1095 counting only the distinct ones).

The product of its digits is 226800, while the sum is 44.

The square root of 51739568 is about 7193.0221743020. The cubic root of 51739568 is about 372.6269537094.

It can be divided in two parts, 5173 and 9568, that added together give a palindrome (14741).

The spelling of 51739568 in words is "fifty-one million, seven hundred thirty-nine thousand, five hundred sixty-eight".