185185222243 has 4 divisors (see below), whose sum is σ = 211640254000. Its totient is φ = 158730190488.

The previous prime is 185185222213. The next prime is 185185222283. The reversal of 185185222243 is 342222581581.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 185185222243 - 2¹³ = 185185214051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 185185222243.

It is not an unprimeable number, because it can be changed into a prime (185185222213) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13227515868 + ... + 13227515881.

It is an arithmetic number, because the mean of its divisors is an integer number (52910063500).

Almost surely, 2^185185222243 is an apocalyptic number.

185185222243 is a deficient number, since it is larger than the sum of its proper divisors (26455031757).

185185222243 is an equidigital number, since it uses as much as digits as its factorization.

185185222243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26455031756.

The product of its digits is 307200, while the sum is 43.

The spelling of 185185222243 in words is "one hundred eighty-five billion, one hundred eighty-five million, two hundred twenty-two thousand, two hundred forty-three".