54136421 has 2 divisors, whose sum is σ = 54136422. Its totient is φ = 54136420.

The previous prime is 54136403. The next prime is 54136427. The reversal of 54136421 is 12463145.

54136421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53085796 + 1050625 = 7286^2 + 1025^2 .

It is a cyclic number.

It is not a de Polignac number, because 54136421 - 2¹⁸ = 53874277 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 (54136427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27068210 + 27068211.

It is an arithmetic number, because the mean of its divisors is an integer number (27068211).

Almost surely, 2^54136421 is an apocalyptic number.

It is an amenable number.

54136421 is a deficient number, since it is larger than the sum of its proper divisors (1).

54136421 is an equidigital number, since it uses as much as digits as its factorization.

54136421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2880, while the sum is 26.

The square root of 54136421 is about 7357.7456465958. The cubic root of 54136421 is about 378.2943430270.

Adding to 54136421 its reverse (12463145), we get a palindrome (66599566).

The spelling of 54136421 in words is "fifty-four million, one hundred thirty-six thousand, four hundred twenty-one".