55615129 has 2 divisors, whose sum is σ = 55615130. Its totient is φ = 55615128.

The previous prime is 55615117. The next prime is 55615141. The reversal of 55615129 is 92151655.

55615129 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (55615117) and next prime (55615141).

It can be written as a sum of positive squares in only one way, i.e., 52229529 + 3385600 = 7227^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 55615129 - 2¹¹ = 55613081 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55615094 and 55615103.

It is not a weakly prime, because it can be changed into another prime (55655129) 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, 27807564 + 27807565.

It is an arithmetic number, because the mean of its divisors is an integer number (27807565).

Almost surely, 2^55615129 is an apocalyptic number.

It is an amenable number.

55615129 is a deficient number, since it is larger than the sum of its proper divisors (1).

55615129 is an equidigital number, since it uses as much as digits as its factorization.

55615129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13500, while the sum is 34.

The square root of 55615129 is about 7457.5551623840. Note that the first 3 decimals coincide. The cubic root of 55615129 is about 381.7077546031.

The spelling of 55615129 in words is "fifty-five million, six hundred fifteen thousand, one hundred twenty-nine".