55368121 has 2 divisors, whose sum is σ = 55368122. Its totient is φ = 55368120.

The previous prime is 55368119. The next prime is 55368149. The reversal of 55368121 is 12186355.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 51681721 + 3686400 = 7189^2 + 1920^2 .

It is a cyclic number.

It is not a de Polignac number, because 55368121 - 2¹ = 55368119 is a prime.

Together with 55368119, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_3302869 and since 55368121 and 3302869 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (55368151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27684060 + 27684061.

It is an arithmetic number, because the mean of its divisors is an integer number (27684061).

Almost surely, 2^55368121 is an apocalyptic number.

It is an amenable number.

55368121 is a deficient number, since it is larger than the sum of its proper divisors (1).

55368121 is an equidigital number, since it uses as much as digits as its factorization.

55368121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 31.

The square root of 55368121 is about 7440.9758096637. The cubic root of 55368121 is about 381.1418126780.

The spelling of 55368121 in words is "fifty-five million, three hundred sixty-eight thousand, one hundred twenty-one".