165203412 has 48 divisors (see below), whose sum is σ = 422718912. Its totient is φ = 49799680.

The previous prime is 165203393. The next prime is 165203413. The reversal of 165203412 is 214302561.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165203413) 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, 22828 + ... + 29180.

It is an arithmetic number, because the mean of its divisors is an integer number (8806644).

Almost surely, 2^165203412 is an apocalyptic number.

165203412 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 165203412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (211359456).

165203412 is an abundant number, since it is smaller than the sum of its proper divisors (257515500).

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

165203412 is a wasteful number, since it uses less digits than its factorization.

165203412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6568 (or 6566 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 165203412 is about 12853.1479412633. The cubic root of 165203412 is about 548.7059516707.

Adding to 165203412 its reverse (214302561), we get a palindrome (379505973).

The spelling of 165203412 in words is "one hundred sixty-five million, two hundred three thousand, four hundred twelve".