857180213 has 2 divisors, whose sum is σ = 857180214. Its totient is φ = 857180212.

The previous prime is 857180201. The next prime is 857180243. The reversal of 857180213 is 312081758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 650913169 + 206267044 = 25513^2 + 14362^2 .

It is a cyclic number.

It is not a de Polignac number, because 857180213 - 2¹⁴ = 857163829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857180243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428590106 + 428590107.

It is an arithmetic number, because the mean of its divisors is an integer number (428590107).

Almost surely, 2^857180213 is an apocalyptic number.

It is an amenable number.

857180213 is a deficient number, since it is larger than the sum of its proper divisors (1).

857180213 is an equidigital number, since it uses as much as digits as its factorization.

857180213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 857180213 is about 29277.6401542201. The cubic root of 857180213 is about 949.9280510607.

The spelling of 857180213 in words is "eight hundred fifty-seven million, one hundred eighty thousand, two hundred thirteen".