54521051220 has 144 divisors (see below), whose sum is σ = 175218458688. Its totient is φ = 13675146240.

The previous prime is 54521051213. The next prime is 54521051243. The reversal of 54521051220 is 2215012545.

54521051220 is a `hidden beast` number, since 545 + 2 + 105 + 12 + 2 + 0 = 666.

It is a super-2 number, since 2×54521051220² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5904247 + ... + 5913473.

It is an arithmetic number, because the mean of its divisors is an integer number (1216794852).

Almost surely, 2^54521051220 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 54521051220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87609229344).

54521051220 is an abundant number, since it is smaller than the sum of its proper divisors (120697407468).

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

54521051220 is a wasteful number, since it uses less digits than its factorization.

54521051220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11190 (or 11185 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

Adding to 54521051220 its reverse (2215012545), we get a palindrome (56736063765).

The spelling of 54521051220 in words is "fifty-four billion, five hundred twenty-one million, fifty-one thousand, two hundred twenty".