51929856 has 144 divisors (see below), whose sum is σ = 167771520. Its totient is φ = 15713280.

The previous prime is 51929851. The next prime is 51929861. The reversal of 51929856 is 65892915.

It is an interprime number because it is at equal distance from previous prime (51929851) and next prime (51929861).

It is a tau number, because it is divible by the number of its divisors (144).

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (51929851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75691 + ... + 76373.

It is an arithmetic number, because the mean of its divisors is an integer number (1165080).

Almost surely, 2^51929856 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 51929856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83885760).

51929856 is an abundant number, since it is smaller than the sum of its proper divisors (115841664).

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

51929856 is a wasteful number, since it uses less digits than its factorization.

51929856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719 (or 699 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The square root of 51929856 is about 7206.2372983409. The cubic root of 51929856 is about 373.0832111478.

The spelling of 51929856 in words is "fifty-one million, nine hundred twenty-nine thousand, eight hundred fifty-six".