54578221 has 2 divisors, whose sum is σ = 54578222. Its totient is φ = 54578220.

The previous prime is 54578201. The next prime is 54578243. The reversal of 54578221 is 12287545.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39062500 + 15515721 = 6250^2 + 3939^2 .

It is a cyclic number.

It is not a de Polignac number, because 54578221 - 2⁵ = 54578189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54578201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27289110 + 27289111.

It is an arithmetic number, because the mean of its divisors is an integer number (27289111).

Almost surely, 2^54578221 is an apocalyptic number.

It is an amenable number.

54578221 is a deficient number, since it is larger than the sum of its proper divisors (1).

54578221 is an equidigital number, since it uses as much as digits as its factorization.

54578221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22400, while the sum is 34.

The square root of 54578221 is about 7387.7074251760. The cubic root of 54578221 is about 379.3206259177.

The spelling of 54578221 in words is "fifty-four million, five hundred seventy-eight thousand, two hundred twenty-one".