857224111 has 2 divisors, whose sum is σ = 857224112. Its totient is φ = 857224110.

The previous prime is 857224097. The next prime is 857224163. The reversal of 857224111 is 111422758.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 857224111 - 2²³ = 848835503 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (857224171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428612055 + 428612056.

It is an arithmetic number, because the mean of its divisors is an integer number (428612056).

Almost surely, 2^857224111 is an apocalyptic number.

857224111 is a deficient number, since it is larger than the sum of its proper divisors (1).

857224111 is an equidigital number, since it uses as much as digits as its factorization.

857224111 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4480, while the sum is 31.

The square root of 857224111 is about 29278.3898293605. The cubic root of 857224111 is about 949.9442667211.

Adding to 857224111 its reverse (111422758), we get a palindrome (968646869).

The spelling of 857224111 in words is "eight hundred fifty-seven million, two hundred twenty-four thousand, one hundred eleven".