54216540 has 180 divisors, whose sum is σ = 198137016. Its totient is φ = 12374208.

The previous prime is 54216529. The next prime is 54216541. The reversal of 54216540 is 4561245.

54216540 is a `hidden beast` number, since 5 + 4 + 2 + 1 + 654 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (180).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54216541) by changing a digit.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 79039 + ... + 79721.

Almost surely, 2^54216540 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 54216540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99068508).

54216540 is an abundant number, since it is smaller than the sum of its proper divisors (143920476).

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

54216540 is a wasteful number, since it uses less digits than its factorization.

54216540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718 (or 700 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 54216540 is about 7363.1881681782. The cubic root of 54216540 is about 378.4808694880.

Adding to 54216540 its reverse (4561245), we get a palindrome (58777785).

It can be divided in two parts, 54216 and 540, that added together give a square (54756 = 234²).

The spelling of 54216540 in words is "fifty-four million, two hundred sixteen thousand, five hundred forty".