55130239 has 2 divisors, whose sum is σ = 55130240. Its totient is φ = 55130238.

The previous prime is 55130227. The next prime is 55130263. The reversal of 55130239 is 93203155.

55130239 is nontrivially palindromic in base 9.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55130239 - 2⁹ = 55129727 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55130209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27565119 + 27565120.

It is an arithmetic number, because the mean of its divisors is an integer number (27565120).

Almost surely, 2^55130239 is an apocalyptic number.

55130239 is a deficient number, since it is larger than the sum of its proper divisors (1).

55130239 is an equidigital number, since it uses as much as digits as its factorization.

55130239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4050, while the sum is 28.

The square root of 55130239 is about 7424.9740066885. The cubic root of 55130239 is about 380.5951868586.

The spelling of 55130239 in words is "fifty-five million, one hundred thirty thousand, two hundred thirty-nine".