51577056 has 144 divisors (see below), whose sum is σ = 155675520. Its totient is φ = 16174080.

The previous prime is 51577007. The next prime is 51577061. The reversal of 51577056 is 65077515.

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

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 51577056.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 473130 + ... + 473238.

It is an arithmetic number, because the mean of its divisors is an integer number (1081080).

Almost surely, 2^51577056 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 51577056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77837760).

51577056 is an abundant number, since it is smaller than the sum of its proper divisors (104098464).

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

51577056 is a wasteful number, since it uses less digits than its factorization.

51577056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 198 counting only the distinct ones).

The product of its (nonzero) digits is 36750, while the sum is 36.

The square root of 51577056 is about 7181.7167863959. The cubic root of 51577056 is about 372.2364088683.

The spelling of 51577056 in words is "fifty-one million, five hundred seventy-seven thousand, fifty-six".