54421321 has 2 divisors, whose sum is σ = 54421322. Its totient is φ = 54421320.

The previous prime is 54421319. The next prime is 54421327. The reversal of 54421321 is 12312445.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 41783296 + 12638025 = 6464^2 + 3555^2 .

It is a cyclic number.

It is not a de Polignac number, because 54421321 - 2¹ = 54421319 is a prime.

Together with 54421319, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 54421292 and 54421301.

It is not a weakly prime, because it can be changed into another prime (54421327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27210660 + 27210661.

It is an arithmetic number, because the mean of its divisors is an integer number (27210661).

Almost surely, 2^54421321 is an apocalyptic number.

It is an amenable number.

54421321 is a deficient number, since it is larger than the sum of its proper divisors (1).

54421321 is an equidigital number, since it uses as much as digits as its factorization.

54421321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 960, while the sum is 22.

The square root of 54421321 is about 7377.0807912073. The cubic root of 54421321 is about 378.9567901393.

Adding to 54421321 its reverse (12312445), we get a palindrome (66733766).

The spelling of 54421321 in words is "fifty-four million, four hundred twenty-one thousand, three hundred twenty-one".