165508226 has 32 divisors (see below), whose sum is σ = 290022768. Its totient is φ = 70133760.

The previous prime is 165508223. The next prime is 165508237. The reversal of 165508226 is 622805561.

165508226 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 12865²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 55279225 + 110229001 = 7435^2 + 10499^2 .

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (165508223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13556 + ... + 22688.

Almost surely, 2^165508226 is an apocalyptic number.

165508226 is a deficient number, since it is larger than the sum of its proper divisors (124514542).

165508226 is a wasteful number, since it uses less digits than its factorization.

165508226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9206.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 165508226 is about 12865.0000388651. Note that the first 4 decimals coincide. The cubic root of 165508226 is about 549.0432136636.

The spelling of 165508226 in words is "one hundred sixty-five million, five hundred eight thousand, two hundred twenty-six".