54845221 has 2 divisors, whose sum is σ = 54845222. Its totient is φ = 54845220.

The previous prime is 54845207. The next prime is 54845227. The reversal of 54845221 is 12254845.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38925121 + 15920100 = 6239^2 + 3990^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54845221 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54845227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27422610 + 27422611.

It is an arithmetic number, because the mean of its divisors is an integer number (27422611).

Almost surely, 2^54845221 is an apocalyptic number.

It is an amenable number.

54845221 is a deficient number, since it is larger than the sum of its proper divisors (1).

54845221 is an equidigital number, since it uses as much as digits as its factorization.

54845221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12800, while the sum is 31.

The square root of 54845221 is about 7405.7559371073. The cubic root of 54845221 is about 379.9381732284.

The spelling of 54845221 in words is "fifty-four million, eight hundred forty-five thousand, two hundred twenty-one".