54221538 has 48 divisors (see below), whose sum is σ = 129111840. Its totient is φ = 15128064.

The previous prime is 54221527. The next prime is 54221567. The reversal of 54221538 is 83512245.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10498 + ... + 14786.

It is an arithmetic number, because the mean of its divisors is an integer number (2689830).

Almost surely, 2^54221538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 54221538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64555920).

54221538 is an abundant number, since it is smaller than the sum of its proper divisors (74890302).

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

54221538 is a wasteful number, since it uses less digits than its factorization.

54221538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351 (or 4344 counting only the distinct ones).

The product of its digits is 9600, while the sum is 30.

The square root of 54221538 is about 7363.5275513846. The cubic root of 54221538 is about 378.4924993293.

The spelling of 54221538 in words is "fifty-four million, two hundred twenty-one thousand, five hundred thirty-eight".