54321221 has 2 divisors, whose sum is σ = 54321222. Its totient is φ = 54321220.

The previous prime is 54321203. The next prime is 54321227. The reversal of 54321221 is 12212345.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54184321 + 136900 = 7361^2 + 370^2 .

It is a cyclic number.

It is not a de Polignac number, because 54321221 - 2¹⁸ = 54059077 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 54321193 and 54321202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54321227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27160610 + 27160611.

It is an arithmetic number, because the mean of its divisors is an integer number (27160611).

Almost surely, 2^54321221 is an apocalyptic number.

It is an amenable number.

54321221 is a deficient number, since it is larger than the sum of its proper divisors (1).

54321221 is an equidigital number, since it uses as much as digits as its factorization.

54321221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 480, while the sum is 20.

The square root of 54321221 is about 7370.2931420670. The cubic root of 54321221 is about 378.7243024823.

Adding to 54321221 its reverse (12212345), we get a palindrome (66533566).

The spelling of 54321221 in words is "fifty-four million, three hundred twenty-one thousand, two hundred twenty-one".