51578112 has 72 divisors (see below), whose sum is σ = 138337920. Its totient is φ = 17059840.

The previous prime is 51578089. The next prime is 51578159. The reversal of 51578112 is 21187515.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 51578112.

It is a congruent number.

It is an unprimeable number.

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, 183412 + ... + 183692.

It is an arithmetic number, because the mean of its divisors is an integer number (1921360).

Almost surely, 2^51578112 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 51578112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69168960).

51578112 is an abundant number, since it is smaller than the sum of its proper divisors (86759808).

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

51578112 is a wasteful number, since it uses less digits than its factorization.

51578112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539 (or 525 counting only the distinct ones).

The product of its digits is 2800, while the sum is 30.

The square root of 51578112 is about 7181.7903060449. The cubic root of 51578112 is about 372.2389492677.

The spelling of 51578112 in words is "fifty-one million, five hundred seventy-eight thousand, one hundred twelve".