165210020 has 12 divisors (see below), whose sum is σ = 346941084. Its totient is φ = 66084000.

The previous prime is 165210011. The next prime is 165210041. The reversal of 165210020 is 20012561.

It can be written as a sum of positive squares in 2 ways, for example, as 131010916 + 34199104 = 11446^2 + 5848^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4130231 + ... + 4130270.

It is an arithmetic number, because the mean of its divisors is an integer number (28911757).

Almost surely, 2^165210020 is an apocalyptic number.

165210020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

165210020 is an abundant number, since it is smaller than the sum of its proper divisors (181731064).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165210020 is a wasteful number, since it uses less digits than its factorization.

165210020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8260510 (or 8260508 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 165210020 is about 12853.4049963424. The cubic root of 165210020 is about 548.7132675014.

Adding to 165210020 its reverse (20012561), we get a palindrome (185222581).

The spelling of 165210020 in words is "one hundred sixty-five million, two hundred ten thousand, twenty".