165229550 has 24 divisors (see below), whose sum is σ = 308439336. Its totient is φ = 65852640.

The previous prime is 165229499. The next prime is 165229553. The reversal of 165229550 is 55922561.

It is a self number, because there is not a number n which added to its sum of digits gives 165229550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165229553) 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 in 11 ways as a sum of consecutive naturals, for example, 8312 + ... + 19988.

It is an arithmetic number, because the mean of its divisors is an integer number (12851639).

Almost surely, 2^165229550 is an apocalyptic number.

165229550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

165229550 is a deficient number, since it is larger than the sum of its proper divisors (143209786).

165229550 is a wasteful number, since it uses less digits than its factorization.

165229550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11972 (or 11967 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 35.

The square root of 165229550 is about 12854.1646947594. The cubic root of 165229550 is about 548.7348883609.

The spelling of 165229550 in words is "one hundred sixty-five million, two hundred twenty-nine thousand, five hundred fifty".