55056121 has 2 divisors, whose sum is σ = 55056122. Its totient is φ = 55056120.

The previous prime is 55056103. The next prime is 55056137. The reversal of 55056121 is 12165055.

55056121 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., 49857721 + 5198400 = 7061^2 + 2280^2 .

It is a cyclic number.

It is not a de Polignac number, because 55056121 - 2⁷ = 55055993 is a prime.

It is not a weakly prime, because it can be changed into another prime (55056191) 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, 27528060 + 27528061.

It is an arithmetic number, because the mean of its divisors is an integer number (27528061).

Almost surely, 2^55056121 is an apocalyptic number.

It is an amenable number.

55056121 is a deficient number, since it is larger than the sum of its proper divisors (1).

55056121 is an equidigital number, since it uses as much as digits as its factorization.

55056121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1500, while the sum is 25.

The square root of 55056121 is about 7419.9811994371. The cubic root of 55056121 is about 380.4245508909.

The spelling of 55056121 in words is "fifty-five million, fifty-six thousand, one hundred twenty-one".