2178313 has 2 divisors, whose sum is σ = 2178314. Its totient is φ = 2178312.

The previous prime is 2178283. The next prime is 2178343. The reversal of 2178313 is 3138712.

It is a balanced prime because it is at equal distance from previous prime (2178283) and next prime (2178343).

It can be written as a sum of positive squares in only one way, i.e., 2039184 + 139129 = 1428^2 + 373^2 .

It is a cyclic number.

It is not a de Polignac number, because 2178313 - 2¹³ = 2170121 is a prime.

2178313 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2178343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089156 + 1089157.

It is an arithmetic number, because the mean of its divisors is an integer number (1089157).

2^2178313 is an apocalyptic number.

It is an amenable number.

2178313 is a deficient number, since it is larger than the sum of its proper divisors (1).

2178313 is an equidigital number, since it uses as much as digits as its factorization.

2178313 is an odious number, because the sum of its binary digits is odd.

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

The square root of 2178313 is about 1475.9109051701. The cubic root of 2178313 is about 129.6303701434.

The spelling of 2178313 in words is "two million, one hundred seventy-eight thousand, three hundred thirteen".