55204129 has 2 divisors, whose sum is σ = 55204130. Its totient is φ = 55204128.

The previous prime is 55204109. The next prime is 55204153. The reversal of 55204129 is 92140255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50794129 + 4410000 = 7127^2 + 2100^2 .

It is a cyclic number.

It is not a de Polignac number, because 55204129 - 2⁷ = 55204001 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55204097 and 55204106.

It is not a weakly prime, because it can be changed into another prime (55204109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27602064 + 27602065.

It is an arithmetic number, because the mean of its divisors is an integer number (27602065).

Almost surely, 2^55204129 is an apocalyptic number.

It is an amenable number.

55204129 is a deficient number, since it is larger than the sum of its proper divisors (1).

55204129 is an equidigital number, since it uses as much as digits as its factorization.

55204129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 55204129 is about 7429.9481155658. The cubic root of 55204129 is about 380.7651457555.

The spelling of 55204129 in words is "fifty-five million, two hundred four thousand, one hundred twenty-nine".