54208221 has 16 divisors (see below), whose sum is σ = 75149760. Its totient is φ = 34715520.

The previous prime is 54208211. The next prime is 54208229. The reversal of 54208221 is 12280245.

It is not a de Polignac number, because 54208221 - 2⁷ = 54208093 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 54208191 and 54208200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54208229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16881 + ... + 19833.

It is an arithmetic number, because the mean of its divisors is an integer number (4696860).

Almost surely, 2^54208221 is an apocalyptic number.

It is an amenable number.

54208221 is a deficient number, since it is larger than the sum of its proper divisors (20941539).

54208221 is a wasteful number, since it uses less digits than its factorization.

54208221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3196.

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 54208221 is about 7362.6232417529. The cubic root of 54208221 is about 378.4615104302.

Adding to 54208221 its reverse (12280245), we get a palindrome (66488466).

The spelling of 54208221 in words is "fifty-four million, two hundred eight thousand, two hundred twenty-one".