55128233 has 2 divisors, whose sum is σ = 55128234. Its totient is φ = 55128232.

The previous prime is 55128223. The next prime is 55128247. The reversal of 55128233 is 33282155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46348864 + 8779369 = 6808^2 + 2963^2 .

It is a cyclic number.

It is not a de Polignac number, because 55128233 - 2⁶ = 55128169 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55128196 and 55128205.

It is not a weakly prime, because it can be changed into another prime (55128223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27564116 + 27564117.

It is an arithmetic number, because the mean of its divisors is an integer number (27564117).

Almost surely, 2^55128233 is an apocalyptic number.

It is an amenable number.

55128233 is a deficient number, since it is larger than the sum of its proper divisors (1).

55128233 is an equidigital number, since it uses as much as digits as its factorization.

55128233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 29.

The square root of 55128233 is about 7424.8389208117. The cubic root of 55128233 is about 380.5905706188.

The spelling of 55128233 in words is "fifty-five million, one hundred twenty-eight thousand, two hundred thirty-three".