840227111 has 2 divisors, whose sum is σ = 840227112. Its totient is φ = 840227110.

The previous prime is 840227093. The next prime is 840227119. The reversal of 840227111 is 111722048.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 840227111 - 2²² = 836032807 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 (840227119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 420113555 + 420113556.

It is an arithmetic number, because the mean of its divisors is an integer number (420113556).

Almost surely, 2^840227111 is an apocalyptic number.

840227111 is a deficient number, since it is larger than the sum of its proper divisors (1).

840227111 is an equidigital number, since it uses as much as digits as its factorization.

840227111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 26.

The square root of 840227111 is about 28986.6712645657. The cubic root of 840227111 is about 943.6238233371.

Adding to 840227111 its reverse (111722048), we get a palindrome (951949159).

The spelling of 840227111 in words is "eight hundred forty million, two hundred twenty-seven thousand, one hundred eleven".