2178133 has 2 divisors, whose sum is σ = 2178134. Its totient is φ = 2178132.

The previous prime is 2178131. The next prime is 2178139. The reversal of 2178133 is 3318712.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1954404 + 223729 = 1398^2 + 473^2 .

It is a cyclic number.

It is not a de Polignac number, because 2178133 - 2¹ = 2178131 is a prime.

Together with 2178131, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 2178098 and 2178107.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2178131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089066 + 1089067.

It is an arithmetic number, because the mean of its divisors is an integer number (1089067).

2^2178133 is an apocalyptic number.

It is an amenable number.

2178133 is a deficient number, since it is larger than the sum of its proper divisors (1).

2178133 is an equidigital number, since it uses as much as digits as its factorization.

2178133 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 25.

The square root of 2178133 is about 1475.8499246197. The cubic root of 2178133 is about 129.6267994736.

The spelling of 2178133 in words is "two million, one hundred seventy-eight thousand, one hundred thirty-three".