55242133 has 2 divisors, whose sum is σ = 55242134. Its totient is φ = 55242132.

The previous prime is 55242127. The next prime is 55242169. The reversal of 55242133 is 33124255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32182929 + 23059204 = 5673^2 + 4802^2 .

It is a cyclic number.

It is not a de Polignac number, because 55242133 - 2²¹ = 53144981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55242098 and 55242107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55242193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27621066 + 27621067.

It is an arithmetic number, because the mean of its divisors is an integer number (27621067).

Almost surely, 2^55242133 is an apocalyptic number.

It is an amenable number.

55242133 is a deficient number, since it is larger than the sum of its proper divisors (1).

55242133 is an equidigital number, since it uses as much as digits as its factorization.

55242133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 25.

The square root of 55242133 is about 7432.5051631331. The cubic root of 55242133 is about 380.8525020184.

Adding to 55242133 its reverse (33124255), we get a palindrome (88366388).

The spelling of 55242133 in words is "fifty-five million, two hundred forty-two thousand, one hundred thirty-three".