55241909 has 2 divisors, whose sum is σ = 55241910. Its totient is φ = 55241908.

The previous prime is 55241881. The next prime is 55241933. The reversal of 55241909 is 90914255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45495025 + 9746884 = 6745^2 + 3122^2 .

It is a cyclic number.

It is not a de Polignac number, because 55241909 - 2¹² = 55237813 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55241939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27620954 + 27620955.

It is an arithmetic number, because the mean of its divisors is an integer number (27620955).

Almost surely, 2^55241909 is an apocalyptic number.

It is an amenable number.

55241909 is a deficient number, since it is larger than the sum of its proper divisors (1).

55241909 is an equidigital number, since it uses as much as digits as its factorization.

55241909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 55241909 is about 7432.4900941744. The cubic root of 55241909 is about 380.8519872479.

The spelling of 55241909 in words is "fifty-five million, two hundred forty-one thousand, nine hundred nine".