55345289 has 2 divisors, whose sum is σ = 55345290. Its totient is φ = 55345288.

The previous prime is 55345243. The next prime is 55345331. The reversal of 55345289 is 98254355.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53071225 + 2274064 = 7285^2 + 1508^2 .

It is a cyclic number.

It is not a de Polignac number, because 55345289 - 2²⁰ = 54296713 is a prime.

It is not a weakly prime, because it can be changed into another prime (55345789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27672644 + 27672645.

It is an arithmetic number, because the mean of its divisors is an integer number (27672645).

Almost surely, 2^55345289 is an apocalyptic number.

It is an amenable number.

55345289 is a deficient number, since it is larger than the sum of its proper divisors (1).

55345289 is an equidigital number, since it uses as much as digits as its factorization.

55345289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216000, while the sum is 41.

The square root of 55345289 is about 7439.4414440870. The cubic root of 55345289 is about 381.0894153409.

The spelling of 55345289 in words is "fifty-five million, three hundred forty-five thousand, two hundred eighty-nine".