51543552 has 80 divisors (see below), whose sum is σ = 143383680. Its totient is φ = 16422912.

The previous prime is 51543539. The next prime is 51543559. The reversal of 51543552 is 25534515.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51543559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34599 + ... + 36057.

It is an arithmetic number, because the mean of its divisors is an integer number (1792296).

Almost surely, 2^51543552 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 51543552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (71691840).

51543552 is an abundant number, since it is smaller than the sum of its proper divisors (91840128).

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

51543552 is a wasteful number, since it uses less digits than its factorization.

51543552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1503 (or 1487 counting only the distinct ones).

The product of its digits is 15000, while the sum is 30.

The square root of 51543552 is about 7179.3838175710. The cubic root of 51543552 is about 372.1557909151.

The spelling of 51543552 in words is "fifty-one million, five hundred forty-three thousand, five hundred fifty-two".