8185213 has 2 divisors, whose sum is σ = 8185214. Its totient is φ = 8185212.

The previous prime is 8185169. The next prime is 8185223. The reversal of 8185213 is 3125818.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7828804 + 356409 = 2798^2 + 597^2 .

It is a cyclic number.

It is not a de Polignac number, because 8185213 - 2¹³ = 8177021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8185223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4092606 + 4092607.

It is an arithmetic number, because the mean of its divisors is an integer number (4092607).

Almost surely, 2^8185213 is an apocalyptic number.

It is an amenable number.

8185213 is a deficient number, since it is larger than the sum of its proper divisors (1).

8185213 is an equidigital number, since it uses as much as digits as its factorization.

8185213 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 28.

The square root of 8185213 is about 2860.9811254183. The cubic root of 8185213 is about 201.5316814809.

The spelling of 8185213 in words is "eight million, one hundred eighty-five thousand, two hundred thirteen".