54221021540 has 192 divisors, whose sum is σ = 136728345600. Its totient is φ = 18043038720.

The previous prime is 54221021539. The next prime is 54221021549. The reversal of 54221021540 is 4512012245.

54221021540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×54221021540² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (54221021549) 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, 73971014 + ... + 73971746.

It is an arithmetic number, because the mean of its divisors is an integer number (712126800).

Almost surely, 2^54221021540 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 54221021540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68364172800).

54221021540 is an abundant number, since it is smaller than the sum of its proper divisors (82507324060).

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

54221021540 is a wasteful number, since it uses less digits than its factorization.

54221021540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1067 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 26.

Adding to 54221021540 its reverse (4512012245), we get a palindrome (58733033785).

The spelling of 54221021540 in words is "fifty-four billion, two hundred twenty-one million, twenty-one thousand, five hundred forty".