165903912 has 48 divisors (see below), whose sum is σ = 451620000. Its totient is φ = 55018656.

The previous prime is 165903911. The next prime is 165903919. The reversal of 165903912 is 219309561.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (165903911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8539 + ... + 20117.

It is an arithmetic number, because the mean of its divisors is an integer number (9408750).

Almost surely, 2^165903912 is an apocalyptic number.

165903912 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

165903912 is an abundant number, since it is smaller than the sum of its proper divisors (285716088).

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

165903912 is a wasteful number, since it uses less digits than its factorization.

165903912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11790 (or 11783 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 165903912 is about 12880.3692493655. The cubic root of 165903912 is about 549.4804040478.

It can be divided in two parts, 16590 and 3912, that added together give a palindrome (20502).

The spelling of 165903912 in words is "one hundred sixty-five million, nine hundred three thousand, nine hundred twelve".