185220207 has 12 divisors (see below), whose sum is σ = 268184280. Its totient is φ = 123182928.

The previous prime is 185220197. The next prime is 185220209. The reversal of 185220207 is 702022581.

It is not a de Polignac number, because 185220207 - 2⁶ = 185220143 is a prime.

It is a super-2 number, since 2×185220207² = 68613050162245698, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (185220209) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20788 + ... + 28329.

It is an arithmetic number, because the mean of its divisors is an integer number (22348690).

Almost surely, 2^185220207 is an apocalyptic number.

185220207 is a deficient number, since it is larger than the sum of its proper divisors (82964073).

185220207 is a wasteful number, since it uses less digits than its factorization.

185220207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49542 (or 49539 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 185220207 is about 13609.5630716052. The cubic root of 185220207 is about 570.0279118372.

Adding to 185220207 its reverse (702022581), we get a palindrome (887242788).

It can be divided in two parts, 18 and 5220207, that added together give a palindrome (5220225).

The spelling of 185220207 in words is "one hundred eighty-five million, two hundred twenty thousand, two hundred seven".