207138227 has 4 divisors (see below), whose sum is σ = 207282240. Its totient is φ = 206994216.

The previous prime is 207138179. The next prime is 207138241. The reversal of 207138227 is 722831702.

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 207138227 - 2²⁰ = 206089651 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 207138193 and 207138202.

It is not an unprimeable number, because it can be changed into a prime (207134227) 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, 69827 + ... + 72732.

It is an arithmetic number, because the mean of its divisors is an integer number (51820560).

Almost surely, 2^207138227 is an apocalyptic number.

207138227 is a deficient number, since it is larger than the sum of its proper divisors (144013).

207138227 is a wasteful number, since it uses less digits than its factorization.

207138227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144012.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 207138227 is about 14392.2974885874. The cubic root of 207138227 is about 591.6798120556.

Adding to 207138227 its reverse (722831702), we get a palindrome (929969929).

The spelling of 207138227 in words is "two hundred seven million, one hundred thirty-eight thousand, two hundred twenty-seven".