54245221 has 2 divisors, whose sum is σ = 54245222. Its totient is φ = 54245220.

The previous prime is 54245203. The next prime is 54245237. The reversal of 54245221 is 12254245.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53217025 + 1028196 = 7295^2 + 1014^2 .

It is a cyclic number.

It is not a de Polignac number, because 54245221 - 2¹¹ = 54243173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54245251) 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 as a sum of consecutive naturals, namely, 27122610 + 27122611.

It is an arithmetic number, because the mean of its divisors is an integer number (27122611).

Almost surely, 2^54245221 is an apocalyptic number.

It is an amenable number.

54245221 is a deficient number, since it is larger than the sum of its proper divisors (1).

54245221 is an equidigital number, since it uses as much as digits as its factorization.

54245221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3200, while the sum is 25.

The square root of 54245221 is about 7365.1355045240. The cubic root of 54245221 is about 378.5475975641.

Adding to 54245221 its reverse (12254245), we get a palindrome (66499466).

The spelling of 54245221 in words is "fifty-four million, two hundred forty-five thousand, two hundred twenty-one".