55147129 has 2 divisors, whose sum is σ = 55147130. Its totient is φ = 55147128.

The previous prime is 55147117. The next prime is 55147207. The reversal of 55147129 is 92174155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50737129 + 4410000 = 7123^2 + 2100^2 .

It is a cyclic number.

It is not a de Polignac number, because 55147129 - 2¹⁵ = 55114361 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55147094 and 55147103.

It is not a weakly prime, because it can be changed into another prime (55147229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27573564 + 27573565.

It is an arithmetic number, because the mean of its divisors is an integer number (27573565).

Almost surely, 2^55147129 is an apocalyptic number.

It is an amenable number.

55147129 is a deficient number, since it is larger than the sum of its proper divisors (1).

55147129 is an equidigital number, since it uses as much as digits as its factorization.

55147129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12600, while the sum is 34.

The square root of 55147129 is about 7426.1112973076. Note that the first 3 decimals coincide. The cubic root of 55147129 is about 380.6340499608.

The spelling of 55147129 in words is "fifty-five million, one hundred forty-seven thousand, one hundred twenty-nine".