51045552 has 120 divisors (see below), whose sum is σ = 156170560. Its totient is φ = 16096320.

The previous prime is 51045551. The next prime is 51045583. The reversal of 51045552 is 25554015.

51045552 is a `hidden beast` number, since 5 + 104 + 5 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51045551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 73527 + ... + 74217.

Almost surely, 2^51045552 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 51045552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78085280).

51045552 is an abundant number, since it is smaller than the sum of its proper divisors (105125008).

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

51045552 is a wasteful number, since it uses less digits than its factorization.

51045552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 733 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 51045552 is about 7144.6169946331. The cubic root of 51045552 is about 370.9533534783.

Adding to 51045552 its reverse (25554015), we get a palindrome (76599567).

The spelling of 51045552 in words is "fifty-one million, forty-five thousand, five hundred fifty-two".