54205421 has 2 divisors, whose sum is σ = 54205422. Its totient is φ = 54205420.

The previous prime is 54205409. The next prime is 54205433. The reversal of 54205421 is 12450245.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (54205409) and next prime (54205433).

It can be written as a sum of positive squares in only one way, i.e., 41744521 + 12460900 = 6461^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 54205421 - 2⁶ = 54205357 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54205471) 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, 27102710 + 27102711.

It is an arithmetic number, because the mean of its divisors is an integer number (27102711).

Almost surely, 2^54205421 is an apocalyptic number.

It is an amenable number.

54205421 is a deficient number, since it is larger than the sum of its proper divisors (1).

54205421 is an equidigital number, since it uses as much as digits as its factorization.

54205421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 54205421 is about 7362.4330896790. The cubic root of 54205421 is about 378.4549941340.

Adding to 54205421 its reverse (12450245), we get a palindrome (66655666).

The spelling of 54205421 in words is "fifty-four million, two hundred five thousand, four hundred twenty-one".