2185128833 has 2 divisors, whose sum is σ = 2185128834. Its totient is φ = 2185128832.

The previous prime is 2185128793. The next prime is 2185128851. The reversal of 2185128833 is 3388215812.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1487799184 + 697329649 = 38572^2 + 26407^2 .

It is a cyclic number.

It is not a de Polignac number, because 2185128833 - 2⁸ = 2185128577 is a prime.

It is not a weakly prime, because it can be changed into another prime (2185122833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1092564416 + 1092564417.

It is an arithmetic number, because the mean of its divisors is an integer number (1092564417).

Almost surely, 2^2185128833 is an apocalyptic number.

It is an amenable number.

2185128833 is a deficient number, since it is larger than the sum of its proper divisors (1).

2185128833 is an equidigital number, since it uses as much as digits as its factorization.

2185128833 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 41.

The square root of 2185128833 is about 46745.3616201651. The cubic root of 2185128833 is about 1297.6543170048.

The spelling of 2185128833 in words is "two billion, one hundred eighty-five million, one hundred twenty-eight thousand, eight hundred thirty-three".