165541222 has 64 divisors (see below), whose sum is σ = 324311040. Its totient is φ = 61488000.

The previous prime is 165541217. The next prime is 165541247. The reversal of 165541222 is 222145561.

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, 450883 + ... + 451249.

It is an arithmetic number, because the mean of its divisors is an integer number (5067360).

Almost surely, 2^165541222 is an apocalyptic number.

165541222 is a deficient number, since it is larger than the sum of its proper divisors (158769818).

165541222 is a wasteful number, since it uses less digits than its factorization.

165541222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 517.

The product of its digits is 4800, while the sum is 28.

The square root of 165541222 is about 12866.2823690451. The cubic root of 165541222 is about 549.0796973006.

Adding to 165541222 its reverse (222145561), we get a palindrome (387686783).

The spelling of 165541222 in words is "one hundred sixty-five million, five hundred forty-one thousand, two hundred twenty-two".