1228205133 has 16 divisors (see below), whose sum is σ = 1836260800. Its totient is φ = 811289520.

The previous prime is 1228205119. The next prime is 1228205141. The reversal of 1228205133 is 3315028221.

1228205133 is a `hidden beast` number, since 122 + 8 + 20 + 513 + 3 = 666.

It is not a de Polignac number, because 1228205133 - 2⁴ = 1228205117 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1228205097 and 1228205106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228205113) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 205723 + ... + 211608.

It is an arithmetic number, because the mean of its divisors is an integer number (114766300).

Almost surely, 2^1228205133 is an apocalyptic number.

It is an amenable number.

1228205133 is a deficient number, since it is larger than the sum of its proper divisors (608055667).

1228205133 is a wasteful number, since it uses less digits than its factorization.

1228205133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417449 (or 417443 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 1228205133 is about 35045.7577033227. The cubic root of 1228205133 is about 1070.9198521417.

The spelling of 1228205133 in words is "one billion, two hundred twenty-eight million, two hundred five thousand, one hundred thirty-three".