55643303 has 2 divisors, whose sum is σ = 55643304. Its totient is φ = 55643302.

The previous prime is 55643297. The next prime is 55643311. The reversal of 55643303 is 30334655.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55643303 - 2⁶ = 55643239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55643353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27821651 + 27821652.

It is an arithmetic number, because the mean of its divisors is an integer number (27821652).

Almost surely, 2^55643303 is an apocalyptic number.

55643303 is a deficient number, since it is larger than the sum of its proper divisors (1).

55643303 is an equidigital number, since it uses as much as digits as its factorization.

55643303 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 29.

The square root of 55643303 is about 7459.4438800758. The cubic root of 55643303 is about 381.7722000097.

Adding to 55643303 its reverse (30334655), we get a palindrome (85977958).

The spelling of 55643303 in words is "fifty-five million, six hundred forty-three thousand, three hundred three".