845511223 has 2 divisors, whose sum is σ = 845511224. Its totient is φ = 845511222.

The previous prime is 845511217. The next prime is 845511253. The reversal of 845511223 is 322115548.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 845511223 - 2¹³ = 845503031 is a prime.

It is equal to p_43363516 and since 845511223 and 43363516 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (845511203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422755611 + 422755612.

It is an arithmetic number, because the mean of its divisors is an integer number (422755612).

Almost surely, 2^845511223 is an apocalyptic number.

845511223 is a deficient number, since it is larger than the sum of its proper divisors (1).

845511223 is an equidigital number, since it uses as much as digits as its factorization.

845511223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9600, while the sum is 31.

The square root of 845511223 is about 29077.6756808380. The cubic root of 845511223 is about 945.5978125340.

The spelling of 845511223 in words is "eight hundred forty-five million, five hundred eleven thousand, two hundred twenty-three".