55281803 has 2 divisors, whose sum is σ = 55281804. Its totient is φ = 55281802.

The previous prime is 55281781. The next prime is 55281827. The reversal of 55281803 is 30818255.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55281803 - 2⁸ = 55281547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55281803.

It is not a weakly prime, because it can be changed into another prime (55281833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27640901 + 27640902.

It is an arithmetic number, because the mean of its divisors is an integer number (27640902).

Almost surely, 2^55281803 is an apocalyptic number.

55281803 is a deficient number, since it is larger than the sum of its proper divisors (1).

55281803 is an equidigital number, since it uses as much as digits as its factorization.

55281803 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 55281803 is about 7435.1733671785. The cubic root of 55281803 is about 380.9436450336.

The spelling of 55281803 in words is "fifty-five million, two hundred eighty-one thousand, eight hundred three".