165226213205 has 16 divisors (see below), whose sum is σ = 199043913600. Its totient is φ = 131666779968.

The previous prime is 165226213171. The next prime is 165226213211. The reversal of 165226213205 is 502312622561.

It is a cyclic number.

It is not a de Polignac number, because 165226213205 - 2¹⁸ = 165225951061 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1667174 + ... + 1763496.

It is an arithmetic number, because the mean of its divisors is an integer number (12440244600).

Almost surely, 2^165226213205 is an apocalyptic number.

It is an amenable number.

165226213205 is a deficient number, since it is larger than the sum of its proper divisors (33817700395).

165226213205 is an equidigital number, since it uses as much as digits as its factorization.

165226213205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97660.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 165226213205 its reverse (502312622561), we get a palindrome (667538835766).

The spelling of 165226213205 in words is "one hundred sixty-five billion, two hundred twenty-six million, two hundred thirteen thousand, two hundred five".