165253231 has 8 divisors (see below), whose sum is σ = 194143824. Its totient is φ = 138673920.

The previous prime is 165253217. The next prime is 165253237. The reversal of 165253231 is 132352561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-165253231 is a prime.

It is a super-2 number, since 2×165253231² = 54617260711878722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 165253231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165253237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 577666 + ... + 577951.

It is an arithmetic number, because the mean of its divisors is an integer number (24267978).

Almost surely, 2^165253231 is an apocalyptic number.

165253231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

165253231 is a deficient number, since it is larger than the sum of its proper divisors (28890593).

165253231 is a wasteful number, since it uses less digits than its factorization.

165253231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155641.

The product of its digits is 5400, while the sum is 28.

The square root of 165253231 is about 12855.0858029031. The cubic root of 165253231 is about 548.7611023364.

The spelling of 165253231 in words is "one hundred sixty-five million, two hundred fifty-three thousand, two hundred thirty-one".