54220221 has 18 divisors (see below), whose sum is σ = 86086910. Its totient is φ = 32860080.

The previous prime is 54220189. The next prime is 54220249. The reversal of 54220221 is 12202245.

It can be written as a sum of positive squares in only one way, i.e., 39312900 + 14907321 = 6270^2 + 3861^2 .

It is not a de Polignac number, because 54220221 - 2⁵ = 54220189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 54220194 and 54220203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54220261) by changing a digit.

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 17 ways as a sum of consecutive naturals, for example, 23806 + ... + 25983.

Almost surely, 2^54220221 is an apocalyptic number.

It is an amenable number.

54220221 is a deficient number, since it is larger than the sum of its proper divisors (31866689).

54220221 is a wasteful number, since it uses less digits than its factorization.

54220221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49817 (or 49803 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 54220221 is about 7363.4381235942. The cubic root of 54220221 is about 378.4894348727.

Adding to 54220221 its reverse (12202245), we get a palindrome (66422466).

The spelling of 54220221 in words is "fifty-four million, two hundred twenty thousand, two hundred twenty-one".