285272111 has 2 divisors, whose sum is σ = 285272112. Its totient is φ = 285272110.

The previous prime is 285272089. The next prime is 285272149. The reversal of 285272111 is 111272582.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 285272111 - 2⁶ = 285272047 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 (285272011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142636055 + 142636056.

It is an arithmetic number, because the mean of its divisors is an integer number (142636056).

Almost surely, 2^285272111 is an apocalyptic number.

285272111 is a deficient number, since it is larger than the sum of its proper divisors (1).

285272111 is an equidigital number, since it uses as much as digits as its factorization.

285272111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2240, while the sum is 29.

The square root of 285272111 is about 16890.0003256365. Note that the first 3 decimals coincide. The cubic root of 285272111 is about 658.2938108553.

The spelling of 285272111 in words is "two hundred eighty-five million, two hundred seventy-two thousand, one hundred eleven".