165256512 has 56 divisors (see below), whose sum is σ = 446568576. Its totient is φ = 53910528.

The previous prime is 165256501. The next prime is 165256513. The reversal of 165256512 is 215652561.

It is a super-2 number, since 2×165256512² = 54619429516812288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165256513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 133 + ... + 18180.

Almost surely, 2^165256512 is an apocalyptic number.

165256512 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 165256512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (223284288).

165256512 is an abundant number, since it is smaller than the sum of its proper divisors (281312064).

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

165256512 is a wasteful number, since it uses less digits than its factorization.

165256512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18375 (or 18365 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The square root of 165256512 is about 12855.2134171316. The cubic root of 165256512 is about 548.7647340824.

The spelling of 165256512 in words is "one hundred sixty-five million, two hundred fifty-six thousand, five hundred twelve".