55201243 has 2 divisors, whose sum is σ = 55201244. Its totient is φ = 55201242.

The previous prime is 55201241. The next prime is 55201253. The reversal of 55201243 is 34210255.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55201243 - 2¹ = 55201241 is a prime.

Together with 55201241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (55201241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27600621 + 27600622.

It is an arithmetic number, because the mean of its divisors is an integer number (27600622).

Almost surely, 2^55201243 is an apocalyptic number.

55201243 is a deficient number, since it is larger than the sum of its proper divisors (1).

55201243 is an equidigital number, since it uses as much as digits as its factorization.

55201243 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 55201243 is about 7429.7538990198. The cubic root of 55201243 is about 380.7585103379.

Adding to 55201243 its reverse (34210255), we get a palindrome (89411498).

The spelling of 55201243 in words is "fifty-five million, two hundred one thousand, two hundred forty-three".