55403233 has 2 divisors, whose sum is σ = 55403234. Its totient is φ = 55403232.

The previous prime is 55403219. The next prime is 55403237. The reversal of 55403233 is 33230455.

It is a happy number.

55403233 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39538944 + 15864289 = 6288^2 + 3983^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55403233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 55403198 and 55403207.

It is not a weakly prime, because it can be changed into another prime (55403237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27701616 + 27701617.

It is an arithmetic number, because the mean of its divisors is an integer number (27701617).

Almost surely, 2^55403233 is an apocalyptic number.

It is an amenable number.

55403233 is a deficient number, since it is larger than the sum of its proper divisors (1).

55403233 is an equidigital number, since it uses as much as digits as its factorization.

55403233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 25.

The square root of 55403233 is about 7443.3348037019. The cubic root of 55403233 is about 381.2223633823. Note that the first 3 decimals are identical.

Adding to 55403233 its reverse (33230455), we get a palindrome (88633688).

The spelling of 55403233 in words is "fifty-five million, four hundred three thousand, two hundred thirty-three".