55235689 has 2 divisors, whose sum is σ = 55235690. Its totient is φ = 55235688.

The previous prime is 55235639. The next prime is 55235711. The reversal of 55235689 is 98653255.

55235689 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., 31304025 + 23931664 = 5595^2 + 4892^2 .

It is a cyclic number.

It is not a de Polignac number, because 55235689 - 2¹⁹ = 54711401 is a prime.

It is not a weakly prime, because it can be changed into another prime (55235639) 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, 27617844 + 27617845.

It is an arithmetic number, because the mean of its divisors is an integer number (27617845).

Almost surely, 2^55235689 is an apocalyptic number.

It is an amenable number.

55235689 is a deficient number, since it is larger than the sum of its proper divisors (1).

55235689 is an equidigital number, since it uses as much as digits as its factorization.

55235689 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 324000, while the sum is 43.

The square root of 55235689 is about 7432.0716492779. The cubic root of 55235689 is about 380.8376926159.

The spelling of 55235689 in words is "fifty-five million, two hundred thirty-five thousand, six hundred eighty-nine".