51478912 has 64 divisors (see below), whose sum is σ = 107712000. Its totient is φ = 24482304.

The previous prime is 51478909. The next prime is 51478913. The reversal of 51478912 is 21987415.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51478913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258589 + ... + 258787.

It is an arithmetic number, because the mean of its divisors is an integer number (1683000).

Almost surely, 2^51478912 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 51478912, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53856000).

51478912 is an abundant number, since it is smaller than the sum of its proper divisors (56233088).

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

51478912 is a wasteful number, since it uses less digits than its factorization.

51478912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303 (or 291 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 51478912 is about 7174.8806261847. The cubic root of 51478912 is about 372.0001541603. Note that the first 3 decimals are identical.

The spelling of 51478912 in words is "fifty-one million, four hundred seventy-eight thousand, nine hundred twelve".