3102181 has 2 divisors, whose sum is σ = 3102182. Its totient is φ = 3102180.

The previous prime is 3102179. The next prime is 3102193. The reversal of 3102181 is 1812013.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3094081 + 8100 = 1759^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 3102181 - 2¹ = 3102179 is a prime.

It is a super-4 number, since 4×3102181⁴ (a number of 27 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

Together with 3102179, it forms a pair of twin primes.

It is equal to p₂₂₃₆₂₁ and since 3102181 and 223621 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 (3102131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1551090 + 1551091.

It is an arithmetic number, because the mean of its divisors is an integer number (1551091).

Almost surely, 2^3102181 is an apocalyptic number.

It is an amenable number.

3102181 is a deficient number, since it is larger than the sum of its proper divisors (1).

3102181 is an equidigital number, since it uses as much as digits as its factorization.

3102181 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 16.

The square root of 3102181 is about 1761.3009396466. The cubic root of 3102181 is about 145.8441603572.

Adding to 3102181 its reverse (1812013), we get a palindrome (4914194).

The spelling of 3102181 in words is "three million, one hundred two thousand, one hundred eighty-one".