2178151 has 2 divisors, whose sum is σ = 2178152. Its totient is φ = 2178150.

The previous prime is 2178149. The next prime is 2178157. The reversal of 2178151 is 1518712.

2178151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2178151 - 2¹ = 2178149 is a prime.

Together with 2178149, it forms a pair of twin primes.

2178151 is a lucky number.

It is equal to p₁₆₁₁₉₇ and since 2178151 and 161197 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2178157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1089075 + 1089076.

It is an arithmetic number, because the mean of its divisors is an integer number (1089076).

2^2178151 is an apocalyptic number.

2178151 is a deficient number, since it is larger than the sum of its proper divisors (1).

2178151 is an equidigital number, since it uses as much as digits as its factorization.

2178151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 560, while the sum is 25.

The square root of 2178151 is about 1475.8560227881. The cubic root of 2178151 is about 129.6271565494.

The spelling of 2178151 in words is "two million, one hundred seventy-eight thousand, one hundred fifty-one".