51543960 has 256 divisors, whose sum is σ = 183859200. Its totient is φ = 11446272.

The previous prime is 51543959. The next prime is 51543967. The reversal of 51543960 is 6934515.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51543967) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1096657 + ... + 1096703.

It is an arithmetic number, because the mean of its divisors is an integer number (718200).

Almost surely, 2^51543960 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 51543960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91929600).

51543960 is an abundant number, since it is smaller than the sum of its proper divisors (132315240).

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

51543960 is a wasteful number, since it uses less digits than its factorization.

51543960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 126 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 33.

The square root of 51543960 is about 7179.4122322095. The cubic root of 51543960 is about 372.1567728625.

The spelling of 51543960 in words is "fifty-one million, five hundred forty-three thousand, nine hundred sixty".