2178528133 has 2 divisors, whose sum is σ = 2178528134. Its totient is φ = 2178528132.

The previous prime is 2178528097. The next prime is 2178528199. The reversal of 2178528133 is 3318258712.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2132315329 + 46212804 = 46177^2 + 6798^2 .

It is a cyclic number.

It is not a de Polignac number, because 2178528133 - 2²⁹ = 1641657221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2178528533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089264066 + 1089264067.

It is an arithmetic number, because the mean of its divisors is an integer number (1089264067).

Almost surely, 2^2178528133 is an apocalyptic number.

It is an amenable number.

2178528133 is a deficient number, since it is larger than the sum of its proper divisors (1).

2178528133 is an equidigital number, since it uses as much as digits as its factorization.

2178528133 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 40.

The square root of 2178528133 is about 46674.7054945181. The cubic root of 2178528133 is about 1296.3463749042.

The spelling of 2178528133 in words is "two billion, one hundred seventy-eight million, five hundred twenty-eight thousand, one hundred thirty-three".