54221440 has 256 divisors, whose sum is σ = 171360000. Its totient is φ = 16257024.

The previous prime is 54221429. The next prime is 54221471. The reversal of 54221440 is 4412245.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2853751 + ... + 2853769.

It is an arithmetic number, because the mean of its divisors is an integer number (669375).

Almost surely, 2^54221440 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 54221440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85680000).

54221440 is an abundant number, since it is smaller than the sum of its proper divisors (117138560).

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

54221440 is a wasteful number, since it uses less digits than its factorization.

54221440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 54221440 is about 7363.5208969623. The cubic root of 54221440 is about 378.4922713001.

Adding to 54221440 its reverse (4412245), we get a palindrome (58633685).

The spelling of 54221440 in words is "fifty-four million, two hundred twenty-one thousand, four hundred forty".