165615225223206 has 64 divisors (see below), whose sum is σ = 362559795227136. Its totient is φ = 50017386182400.

The previous prime is 165615225223181. The next prime is 165615225223213. The reversal of 165615225223206 is 602322522516561.

It is a super-3 number, since 3×165615225223206³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133891240 + ... + 135122516.

It is an arithmetic number, because the mean of its divisors is an integer number (5664996800424).

Almost surely, 2^{165615225223206} is an apocalyptic number.

165615225223206 is an abundant number, since it is smaller than the sum of its proper divisors (196944570003930).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165615225223206 is a wasteful number, since it uses less digits than its factorization.

165615225223206 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1238157.

The product of its (nonzero) digits is 2592000, while the sum is 48.

Adding to 165615225223206 its reverse (602322522516561), we get a palindrome (767937747739767).

The spelling of 165615225223206 in words is "one hundred sixty-five trillion, six hundred fifteen billion, two hundred twenty-five million, two hundred twenty-three thousand, two hundred six".