165494228 has 6 divisors (see below), whose sum is σ = 289614906. Its totient is φ = 82747112.

The previous prime is 165494227. The next prime is 165494239. The reversal of 165494228 is 822494561.

It can be written as a sum of positive squares in only one way, i.e., 100240144 + 65254084 = 10012^2 + 8078^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165494227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20686775 + ... + 20686782.

It is an arithmetic number, because the mean of its divisors is an integer number (48269151).

Almost surely, 2^165494228 is an apocalyptic number.

It is an amenable number.

165494228 is a deficient number, since it is larger than the sum of its proper divisors (124120678).

165494228 is a wasteful number, since it uses less digits than its factorization.

165494228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41373561 (or 41373559 counting only the distinct ones).

The product of its digits is 138240, while the sum is 41.

The square root of 165494228 is about 12864.4559931619. The cubic root of 165494228 is about 549.0277346272.

The spelling of 165494228 in words is "one hundred sixty-five million, four hundred ninety-four thousand, two hundred twenty-eight".